diff --git a/_build/data/transport.core.system_settings.php b/_build/data/transport.core.system_settings.php
index a34f938f995..7a54d35138d 100644
--- a/_build/data/transport.core.system_settings.php
+++ b/_build/data/transport.core.system_settings.php
@@ -993,6 +993,24 @@
   'area' => 'manager',
   'editedon' => null,
 ], '', true, true);
+$settings['manager_datetime_separator'] = $xpdo->newObject(modSystemSetting::class);
+$settings['manager_datetime_separator']->fromArray([
+  'key' => 'manager_datetime_separator',
+  'value' => ', ',
+  'xtype' => 'textfield',
+  'namespace' => 'core',
+  'area' => 'manager',
+  'editedon' => null,
+], '', true, true);
+$settings['manager_datetime_empty_value'] = $xpdo->newObject(modSystemSetting::class);
+$settings['manager_datetime_empty_value']->fromArray([
+  'key' => 'manager_datetime_empty_value',
+  'value' => '—',
+  'xtype' => 'textfield',
+  'namespace' => 'core',
+  'area' => 'manager',
+  'editedon' => null,
+], '', true, true);
 $settings['manager_direction'] = $xpdo->newObject(modSystemSetting::class);
 $settings['manager_direction']->fromArray([
   'key' => 'manager_direction',
diff --git a/core/lexicon/en/default.inc.php b/core/lexicon/en/default.inc.php
index 58145332f7f..93a8896ba0b 100644
--- a/core/lexicon/en/default.inc.php
+++ b/core/lexicon/en/default.inc.php
@@ -97,6 +97,7 @@
 $_lang['data_err_load'] = 'Error loading data.';
 $_lang['date'] = 'Date';
 $_lang['datechanged'] = 'Date changed';
+$_lang['datetime_conversion_err_invalid_mysql_format'] = 'Attempted to convert the value “[[+value]]” to a timestamp, but the the value is not in the required mysql format (Y-m-d H:i:s).';
 $_lang['db_header'] = 'Database tables';
 $_lang['db_info_mysql'] = 'If a table has an overhead, you may optimize it by clicking on the link in the Overhead column.';
 $_lang['delete'] = 'Delete';
@@ -510,6 +511,7 @@
 $_lang['untitled_tv'] = 'Untitled tv';
 $_lang['untitled_weblink'] = 'Untitled weblink';
 $_lang['untitled_symlink'] = 'Untitled symlink';
+$_lang['unedited'] = 'Unedited';
 $_lang['unknown'] = 'Unknown';
 $_lang['unsaved_changes'] = 'There are unsaved changes. Are you sure you want to leave this page?';
 $_lang['update'] = 'Update';
diff --git a/core/lexicon/en/setting.inc.php b/core/lexicon/en/setting.inc.php
index 03cf9c14fa8..3045ee95c88 100644
--- a/core/lexicon/en/setting.inc.php
+++ b/core/lexicon/en/setting.inc.php
@@ -219,6 +219,12 @@
 $_lang['setting_date_timezone'] = 'Default Time Zone';
 $_lang['setting_date_timezone_desc'] = 'Controls the default timezone setting for PHP date functions, if not empty. If empty and the PHP date.timezone ini setting is not set in your environment, UTC will be assumed.';
 
+$_lang['manager_datetime_empty_value'] = 'Datetime Empty Value';
+$_lang['manager_datetime_empty_value_desc'] = 'The text (if any) that will show in grids and forms when a datetime field’s value has not been set. (Default: “–” [a single en dash])';
+
+$_lang['manager_datetime_separator'] = 'Datetime Separator';
+$_lang['manager_datetime_separator_desc'] = 'When the date and time are shown as a combined element, these characters will be used to visually seapate them. (Default: “, ” [comma and space])';
+
 $_lang['setting_debug'] = 'Debug';
 $_lang['setting_debug_desc'] = 'Controls turning debugging on/off in MODX and/or sets the PHP error_reporting level. \'\' = use current error_reporting, \'0\' = false (error_reporting = 0), \'1\' = true (error_reporting = -1), or any valid error_reporting value (as an integer).';
 
diff --git a/core/lexicon/en/workspace.inc.php b/core/lexicon/en/workspace.inc.php
index 324f3477390..96a314c9489 100644
--- a/core/lexicon/en/workspace.inc.php
+++ b/core/lexicon/en/workspace.inc.php
@@ -60,6 +60,7 @@
 $_lang['newest_additions'] = 'Newest Additions';
 $_lang['no_preview'] = 'No Preview';
 $_lang['not_installed'] = 'Not Installed';
+$_lang['not_updated'] = 'Not Updated';
 $_lang['package'] = 'Package';
 $_lang['package_add'] = 'New Package';
 $_lang['package_already_downloaded'] = 'Package already downloaded';
diff --git a/core/src/Revolution/Formatter/modManagerDateFormatter.php b/core/src/Revolution/Formatter/modManagerDateFormatter.php
new file mode 100644
index 00000000000..b89a0fa421a
--- /dev/null
+++ b/core/src/Revolution/Formatter/modManagerDateFormatter.php
@@ -0,0 +1,244 @@
+<?php
+
+/*
+ * This file is part of the MODX Revolution package.
+ *
+ * Copyright (c) MODX, LLC
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace MODX\Revolution\Formatter;
+
+use MODX\Revolution\modX;
+
+/**
+ * Provides utility methods for processors and controllers
+ *
+ * @package MODX\Revolution
+ */
+class modManagerDateFormatter
+{
+    /**
+     * A reference to the modX object.
+     * @var modX $modx
+     */
+    protected ?modX $modx = null;
+
+    // DATE FORMATTER PROPERTIES
+
+    /**
+     * @var string $managerDateFormat The php datetime format for dates, as defined in the system settings
+     */
+    protected string $managerDateFormat = '';
+
+    /**
+     * @var string $managerTimeFormat The php datetime format for times, as defined in the system settings
+     */
+    protected string $managerTimeFormat = '';
+
+    /**
+     * @var string $managerDateHiddenFormat Standard mysql format required for date transformations
+     */
+    protected string $managerDateHiddenFormat = 'Y-m-d H:i:s';
+
+    /**
+     * @var array $managerDateEmptyValues A list of possible values representing an empty date
+     */
+    protected array $managerDateEmptyValues = [
+        '',
+        '-001-11-30 00:00:00',
+        '-1-11-30 00:00:00',
+        '1969-12-31 00:00:00',
+        '0000-00-00 00:00:00',
+        0,
+        '0',
+        null
+    ];
+
+    /**
+     * @var string $managerDateEmptyDisplay The text (if any) to show for empty dates
+     */
+    private string $managerDateEmptyDisplay = '';
+
+
+    public function __construct(modX $modx)
+    {
+        $this->modx =& $modx;
+        $this->managerDateFormat = $this->modx->getOption('manager_date_format', null, 'Y-m-d', true);
+        $this->managerTimeFormat = $this->modx->getOption('manager_time_format', null, 'H:i', true);
+        $this->managerDateEmptyDisplay = $this->modx->getOption('manager_datetime_empty_value', null, '–', true);
+    }
+
+    public function isEmpty($value): bool
+    {
+        return in_array($value, $this->managerDateEmptyValues);
+    }
+
+    /**
+     * Calculates the Unix timestamp for a valid date/time-related value,
+     * applying the system-specified server offset if applicable
+     * @param string|int $value The value to transform (a Unix timestamp or mysql-format string)
+     * @param bool $useOffset Whether to use the offset time (system setting) in the date calculation
+     * @return int|null The calculated timestamp
+     */
+    protected function parseValue($value, bool $useOffset = false): ?int
+    {
+        if ($this->isEmpty($value)) {
+            return null;
+        }
+
+        if (!modX::isValidTimestamp($value)) {
+            // If not a timestamp integer, expecting mysql-formatted value
+            $dateTime = \DateTimeImmutable::createFromFormat($this->managerDateHiddenFormat, $value);
+            if ($dateTime === false) {
+                $msg = $this->modx->lexicon('datetime_conversion_err_invalid_mysql_format', ['value' => $value]);
+                $this->modx->log(modX::LOG_LEVEL_WARN, $msg);
+                return 0;
+            }
+            $value = $dateTime->getTimestamp();
+        }
+
+        $value = (int)$value;
+
+        if (!$useOffset) {
+            return $value;
+        }
+
+        $offset = floatval($this->modx->getOption('server_offset_time', null, 0)) * 3600;
+
+        return $value + $offset;
+    }
+
+    /**
+     * Transforms a date/time-related value using the specified DateTime format
+     * @param string|int $value The value to transform (a Unix timestamp or mysql-format string)
+     * @param string $format The custom format to use when formatting the $value
+     * @param bool $useOffset Whether to use the offset time (system setting) in the date calculation
+     * @param string|null $emptyValue The text to show when the $value passed is empty
+     * @return string The formatted date
+     */
+    public function format($value, string $format, bool $useOffset = false, ?string $emptyValue = null): string
+    {
+        $value = $this->parseValue($value, $useOffset);
+
+        if ($value === null) {
+            return $emptyValue === null ? $this->managerDateEmptyDisplay : $emptyValue;
+        }
+
+        return date($format, $value);
+    }
+
+    /**
+     * Transforms a date/time-related value according to the DateTime system format used for hidden values
+     * @param string|int $value The value to transform (a Unix timestamp or mysql-format string)
+     * @return string The formatted date
+     */
+    public function formatHidden($value): string
+    {
+        return $this->format($value, $this->managerDateHiddenFormat, false, '');
+    }
+
+    /**
+     * Transforms a date/time-related value into the specified date-only DateTime format
+     * @param string|int $value The value to transform (a Unix timestamp or mysql-format string)
+     * @param bool $useOffset Whether to use the offset time (system setting) in the date calculation
+     * @param string|null $emptyValue The text to show when the $value passed is empty
+     * @return string The formatted date
+     */
+    public function formatDate($value, bool $useOffset = false, ?string $emptyValue = null): string
+    {
+        return $this->format($value, $this->managerDateFormat, $useOffset, $emptyValue);
+    }
+
+    /**
+     * Transforms a date/time-related value into the specified time-only DateTime format
+     * @param string|int $value The value to transform (a Unix timestamp or mysql-format string)
+     * @param bool $useOffset Whether to use the offset time (system setting) in the date calculation
+     * @param string|null $emptyValue The text to show when the $value passed is empty
+     * @return string The formatted date
+     */
+    public function formatTime($value, bool $useOffset = false, ?string $emptyValue = null): string
+    {
+        return $this->format($value, $this->managerTimeFormat, $useOffset, $emptyValue);
+    }
+
+    /**
+     * Transforms a date/time-related value into the specified DateTime format showing
+     * both date and time, including an optional system-specified separator
+     * @param string|int $value The value to transform (a Unix timestamp or mysql-format string)
+     * @param bool $useOffset Whether to use the offset time (system setting) in the date calculation
+     * @param string|null $emptyValue The text to show when the $value passed is empty
+     * @return string The formatted date
+     */
+    public function formatDateTime($value, bool $useOffset = false, ?string $emptyValue = null): string
+    {
+        $managerDateTimeSeparator = $this->modx->getOption('manager_datetime_separator', null, ', ', true);
+        $format = $this->managerDateFormat . $managerDateTimeSeparator . $this->managerTimeFormat;
+
+        return $this->format($value, $format, $useOffset, $emptyValue);
+    }
+
+    /**
+     * Formats a Resource-related date when applicable and includes localized default text to
+     * represent conditions where a date is not present or applicable
+     *
+     * @param string|int $value The source date value to format
+     * @param string $whichDate An identifier specifying the type of date being formatted
+     * @param bool $useStandardEmptyValue Whether to use the default empty value defined in the system settings
+     * @return string The formatted date or relevant text indicating an empty date value
+     */
+    public function formatResourceDate($value, string $whichDate = 'created', bool $useStandardEmptyValue = true): string
+    {
+        if ($useStandardEmptyValue) {
+            return $this->formatDateTime($value, true, null);
+        }
+        switch ($whichDate) {
+            case 'edited':
+                $emptyValue = $this->modx->lexicon('unedited');
+                break;
+            case 'publish':
+            case 'unpublish':
+                $emptyValue = $this->modx->lexicon('notset');
+                break;
+            case 'published':
+                $emptyValue = $this->modx->lexicon('unpublished');
+                break;
+            default:
+                $emptyValue = $this->modx->lexicon('unknown');
+        }
+        $emptyValue = '(' . $emptyValue . ')';
+
+        return $this->formatDateTime($value, true, $emptyValue);
+    }
+
+    /**
+     * Formats a Package-related date when applicable and includes localized default text to
+     * represent conditions where a date is not present or applicable
+     *
+     * @param string|int $value The source date value to format
+     * @param string $whichDate An identifier specifying the type of date being formatted
+     * @param bool $useStandardEmptyValue Whether to use the default empty value defined in the system settings
+     * @return string The formatted date or relevant text indicating an empty date value
+     */
+    public function formatPackageDate($value, string $whichDate = 'created', bool $useStandardEmptyValue = true): string
+    {
+        if ($useStandardEmptyValue) {
+            return $this->formatDateTime($value, true, null);
+        }
+        switch ($whichDate) {
+            case 'installed':
+                $emptyValue = $this->modx->lexicon('not_installed');
+                break;
+            case 'updated':
+                $emptyValue = $this->modx->lexicon('not_updated');
+                break;
+            default:
+                $emptyValue = $this->modx->lexicon('unknown');
+        }
+        $emptyValue = '(' . $emptyValue . ')';
+
+        return $this->formatDateTime($value, true, $emptyValue);
+    }
+}
diff --git a/core/src/Revolution/Processors/Browser/Directory/GetFiles.php b/core/src/Revolution/Processors/Browser/Directory/GetFiles.php
index 90a8aa692fc..2bd2550ca5b 100644
--- a/core/src/Revolution/Processors/Browser/Directory/GetFiles.php
+++ b/core/src/Revolution/Processors/Browser/Directory/GetFiles.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of the MODX Revolution package.
  *
@@ -10,7 +11,7 @@
 
 namespace MODX\Revolution\Processors\Browser\Directory;
 
-
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\Processors\Browser\Browser;
 
 /**
@@ -45,8 +46,16 @@ public function process()
         }
         $list = $this->source->getObjectsInContainer($dir);
 
-        return $this->source->hasErrors()
-            ? $this->failure($this->source->getErrors(), [])
-            : $this->outputArray($list);
+        if ($this->source->hasErrors()) {
+            return $this->failure($this->source->getErrors(), []);
+        }
+
+        /** @var modManagerDateFormatter $formatter */
+        $formatter = $this->modx->services->get(modManagerDateFormatter::class);
+        foreach ($list as $i => $file) {
+            $list[$i]['lastmod'] = $formatter->formatDateTime($file['lastmod']);
+        }
+
+        return $this->outputArray($list);
     }
 }
diff --git a/core/src/Revolution/Processors/Context/Setting/GetList.php b/core/src/Revolution/Processors/Context/Setting/GetList.php
index dc8e42429f0..b0188677d6e 100644
--- a/core/src/Revolution/Processors/Context/Setting/GetList.php
+++ b/core/src/Revolution/Processors/Context/Setting/GetList.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of the MODX Revolution package.
  *
@@ -10,7 +11,7 @@
 
 namespace MODX\Revolution\Processors\Context\Setting;
 
-
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\modContextSetting;
 use MODX\Revolution\Processors\Model\GetListProcessor;
 use MODX\Revolution\modX;
@@ -34,20 +35,20 @@ class GetList extends GetListProcessor
     public $languageTopics = ['setting', 'namespace'];
     public $permission = 'settings';
     public $defaultSortField = 'key';
-    protected $dateFormat;
+
+    private modManagerDateFormatter $formatter;
 
     public function initialize()
     {
         $initialized = parent::initialize();
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
         $this->setDefaultProperties([
             'key' => false,
             'namespace' => false,
             'area' => false,
+            'dateFormat' => ''
         ]);
 
-        $this->dateFormat = $this->modx->getOption('manager_date_format') . ', '
-            . $this->modx->getOption('manager_time_format');
-
         return $initialized;
     }
 
@@ -110,8 +111,10 @@ public function prepareRow(xPDOObject $object)
         $k = 'setting_' . $settingArray['key'];
 
         /* if 3rd party setting, load proper text, fallback to english */
-        $this->modx->lexicon->load('en:' . $object->get('namespace') . ':default',
-            'en:' . $object->get('namespace') . ':setting');
+        $this->modx->lexicon->load(
+            'en:' . $object->get('namespace') . ':default',
+            'en:' . $object->get('namespace') . ':setting'
+        );
         $this->modx->lexicon->load($object->get('namespace') . ':default', $object->get('namespace') . ':setting');
 
         /* get translated area text */
@@ -128,8 +131,10 @@ public function prepareRow(xPDOObject $object)
                 $settingArray['description_trans'] = $this->modx->lexicon($k . '_desc');
                 $settingArray['description'] = $k . '_desc';
             } else {
-                $this->modx->log(modX::LOG_LEVEL_DEBUG,
-                    '[' . __METHOD__ . '] lexicon entry for ' . $k . '_desc not found');
+                $this->modx->log(
+                    modX::LOG_LEVEL_DEBUG,
+                    '[' . __METHOD__ . '] lexicon entry for ' . $k . '_desc not found'
+                );
                 $settingArray['description_trans'] = !empty($settingArray['description']) ? $settingArray['description'] : '';
             }
         } else {
@@ -148,10 +153,12 @@ public function prepareRow(xPDOObject $object)
 
         $settingArray['oldkey'] = $settingArray['key'];
 
-        $settingArray['editedon'] = in_array(
-            $object->get('editedon'),
-            ['-001-11-30 00:00:00', '-1-11-30 00:00:00', '0000-00-00 00:00:00', null]
-        ) ? '' : date($this->dateFormat, strtotime($object->get('editedon')));
+        $customFormat = $this->getProperty('dateFormat');
+        $editedOn = $object->get('editedon');
+        $settingArray['editedon'] =  !empty($customFormat)
+            ? $this->formatter->format($editedOn, $customFormat)
+            : $this->formatter->formatDateTime($editedOn)
+            ;
 
         return $settingArray;
     }
diff --git a/core/src/Revolution/Processors/Processor.php b/core/src/Revolution/Processors/Processor.php
index 79565241fe7..50e19f02d57 100644
--- a/core/src/Revolution/Processors/Processor.php
+++ b/core/src/Revolution/Processors/Processor.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of the MODX Revolution package.
  *
@@ -17,7 +18,8 @@
  *
  * @package MODX\Revolution
  */
-abstract class Processor {
+abstract class Processor
+{
     /**
      * A reference to the modX object.
      * @var modX $modx
@@ -45,7 +47,8 @@ abstract class Processor {
      * @param modX $modx A reference to the modX instance
      * @param array $properties An array of properties
      */
-    public function __construct(modX $modx,array $properties = []) {
+    public function __construct(modX $modx, array $properties = [])
+    {
         $this->modx =& $modx;
         $this->setProperties($properties);
     }
@@ -55,7 +58,8 @@ public function __construct(modX $modx,array $properties = []) {
      * @param string $path The absolute path
      * @return void
      */
-    public function setPath($path) {
+    public function setPath($path)
+    {
         $this->path = $path;
     }
 
@@ -66,9 +70,10 @@ public function setPath($path) {
      *
      * @return void
      */
-    public function setProperties($properties, $merge = true) {
+    public function setProperties($properties, $merge = true)
+    {
         unset($properties['HTTP_MODAUTH']);
-        $this->properties = $merge ? array_merge($this->properties,$properties) : $properties;
+        $this->properties = $merge ? array_merge($this->properties, $properties) : $properties;
     }
 
     /**
@@ -76,7 +81,8 @@ public function setProperties($properties, $merge = true) {
      * @param string $key
      * @return void
      */
-    public function unsetProperty($key) {
+    public function unsetProperty($key)
+    {
         unset($this->properties[$key]);
     }
 
@@ -85,7 +91,10 @@ public function unsetProperty($key) {
      *
      * @return boolean
      */
-    public function checkPermissions() { return true; }
+    public function checkPermissions()
+    {
+        return true;
+    }
 
     /**
      * Can be used to provide custom methods prior to processing. Return true to tell MODX that the Processor
@@ -93,14 +102,18 @@ public function checkPermissions() { return true; }
      *
      * @return boolean
      */
-    public function initialize() { return true; }
+    public function initialize()
+    {
+        return true;
+    }
 
     /**
      * Load a collection of Language Topics for this processor.
      * Override this in your derivative class to provide the array of topics to load.
      * @return array
      */
-    public function getLanguageTopics() {
+    public function getLanguageTopics()
+    {
         return [];
     }
 
@@ -110,8 +123,9 @@ public function getLanguageTopics() {
      * @param mixed $object
      * @return array|string
      */
-    public function success($msg = '',$object = null) {
-        return $this->modx->error->success($msg,$object);
+    public function success($msg = '', $object = null)
+    {
+        return $this->modx->error->success($msg, $object);
     }
 
     /**
@@ -120,15 +134,17 @@ public function success($msg = '',$object = null) {
      * @param mixed $object
      * @return array|string
      */
-    public function failure($msg = '',$object = null) {
-        return $this->modx->error->failure($msg,$object);
+    public function failure($msg = '', $object = null)
+    {
+        return $this->modx->error->failure($msg, $object);
     }
 
     /**
      * Return whether or not the processor has errors
      * @return boolean
      */
-    public function hasErrors() {
+    public function hasErrors()
+    {
         return $this->modx->error->hasError();
     }
 
@@ -138,8 +154,9 @@ public function hasErrors() {
      * @param string $message
      * @return void
      */
-    public function addFieldError($key,$message = '') {
-        $this->modx->error->addField($key,$message);
+    public function addFieldError($key, $message = '')
+    {
+        $this->modx->error->addField($key, $message);
     }
 
     /**
@@ -152,9 +169,10 @@ public function addFieldError($key,$message = '') {
      * @param array $properties An array of properties being run with the processor
      * @return Processor The class specified by $className
      */
-    public static function getInstance(modX $modx,$className,$properties = []) {
+    public static function getInstance(modX $modx, $className, $properties = [])
+    {
         /** @var Processor $processor */
-        $processor = new $className($modx,$properties);
+        $processor = new $className($modx, $properties);
         return $processor;
     }
 
@@ -170,7 +188,8 @@ abstract public function process();
      * Run the processor, returning a ProcessorResponse object.
      * @return ProcessorResponse
      */
-    public function run() {
+    public function run()
+    {
         if (!$this->checkPermissions()) {
             $o = $this->failure($this->modx->lexicon('permission_denied_processor', array(
                 'action' => preg_replace('/[^\w\-_\/]+/i', '', $this->getProperty('action')),
@@ -189,7 +208,7 @@ public function run() {
                 $o = $this->process();
             }
         }
-        $response = new ProcessorResponse($this->modx,$o);
+        $response = new ProcessorResponse($this->modx, $o);
         return $response;
     }
 
@@ -199,8 +218,9 @@ public function run() {
      * @param mixed $default
      * @return mixed
      */
-    public function getProperty($k,$default = null) {
-        return array_key_exists($k,$this->properties) ? $this->properties[$k] : $default;
+    public function getProperty($k, $default = null)
+    {
+        return array_key_exists($k, $this->properties) ? $this->properties[$k] : $default;
     }
 
     /**
@@ -210,7 +230,8 @@ public function getProperty($k,$default = null) {
      * @param mixed $v
      * @return void
      */
-    public function setProperty($k,$v) {
+    public function setProperty($k, $v)
+    {
         $this->properties[$k] = $v;
     }
 
@@ -222,11 +243,12 @@ public function setProperty($k,$v) {
      * @param boolean $force
      * @return int|null
      */
-    public function setCheckbox($k,$force = false) {
+    public function setCheckbox($k, $force = false)
+    {
         $v = null;
         if ($force || isset($this->properties[$k])) {
             $v = empty($this->properties[$k]) || $this->properties[$k] === 'false' ? 0 : 1;
-            $this->setProperty($k,$v);
+            $this->setProperty($k, $v);
         }
         return $v;
     }
@@ -235,7 +257,8 @@ public function setCheckbox($k,$force = false) {
      * Get an array of properties for this processor
      * @return array
      */
-    public function getProperties() {
+    public function getProperties()
+    {
         return $this->properties;
     }
 
@@ -245,8 +268,9 @@ public function getProperties() {
      * @param array $properties
      * @return array The newly merged properties array
      */
-    public function setDefaultProperties(array $properties = []) {
-        $this->properties = array_merge($properties,$this->properties);
+    public function setDefaultProperties(array $properties = [])
+    {
+        $this->properties = array_merge($properties, $this->properties);
         return $this->properties;
     }
 
@@ -261,8 +285,11 @@ public function setDefaultProperties(array $properties = []) {
      * @param mixed $count The total number of objects. Used for pagination.
      * @return string The JSON output.
      */
-    public function outputArray(array $array,$count = false) {
-        if ($count === false) { $count = count($array); }
+    public function outputArray(array $array, $count = false)
+    {
+        if ($count === false) {
+            $count = count($array);
+        }
         $output = json_encode([
             'success' => true,
             'total' => $count,
@@ -270,7 +297,7 @@ public function outputArray(array $array,$count = false) {
         ], JSON_INVALID_UTF8_SUBSTITUTE);
 
         if ($output === false) {
-            $this->modx->log(modX::LOG_LEVEL_ERROR, 'Processor failed creating output array due to JSON error '.json_last_error());
+            $this->modx->log(modX::LOG_LEVEL_ERROR, 'Processor failed creating output array due to JSON error ' . json_last_error());
             return json_encode(['success' => false]);
         }
         return $output;
@@ -286,7 +313,8 @@ public function outputArray(array $array,$count = false) {
      * @param mixed $data The PHP data to be converted.
      * @return string The extended JSON-encoded string.
      */
-    public function toJSON($data) {
+    public function toJSON($data)
+    {
         if (is_array($data)) {
             array_walk_recursive($data, [&$this, '_encodeLiterals']);
         }
@@ -300,12 +328,15 @@ public function toJSON($data) {
      * @param mixed &$value A reference to the value to be encoded if it is identified as a literal.
      * @param integer|string $key The array key corresponding to the value.
      */
-    protected function _encodeLiterals(&$value, $key) {
+    protected function _encodeLiterals(&$value, $key)
+    {
         if (is_string($value)) {
             /* properly handle common literal structures */
-            if (strpos($value, 'function(') === 0
+            if (
+                strpos($value, 'function(') === 0
                 || strpos($value, 'new Function(') === 0
-                || strpos($value, 'Ext.') === 0) {
+                || strpos($value, 'Ext.') === 0
+            ) {
                 $value = '@@' . base64_encode($value) . '@@';
             }
         }
@@ -318,11 +349,14 @@ protected function _encodeLiterals(&$value, $key) {
      * @param string $string The JSON-encoded string with encoded literals.
      * @return string The JSON-encoded string with literals restored.
      */
-    protected function _decodeLiterals($string) {
+    protected function _decodeLiterals($string)
+    {
         $pattern = '/"@@(.*?)@@"/';
         $string = preg_replace_callback(
             $pattern,
-            function ($matches) { return base64_decode($matches[1]); },
+            function ($matches) {
+                return base64_decode($matches[1]);
+            },
             $string
         );
         return $string;
@@ -335,7 +369,8 @@ function ($matches) { return base64_decode($matches[1]); },
      * @param string $separator The separator for each event response
      * @return string The processed response.
      */
-    public function processEventResponse($response,$separator = "\n") {
+    public function processEventResponse($response, $separator = "\n")
+    {
         if (is_array($response)) {
             $result = false;
             foreach ($response as $msg) {
diff --git a/core/src/Revolution/Processors/Resource/Data.php b/core/src/Revolution/Processors/Resource/Data.php
index c600d2cc827..547a2e117b2 100644
--- a/core/src/Revolution/Processors/Resource/Data.php
+++ b/core/src/Revolution/Processors/Resource/Data.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of MODX Revolution.
  *
@@ -10,10 +11,11 @@
 
 namespace MODX\Revolution\Processors\Resource;
 
-use MODX\Revolution\Processors\Processor;
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\modResource;
 use MODX\Revolution\modTemplate;
 use MODX\Revolution\modUser;
+use MODX\Revolution\Processors\Processor;
 use xPDO\Cache\xPDOCacheManager;
 use xPDO\xPDO;
 
@@ -28,6 +30,8 @@ class Data extends Processor
     /** @var modResource $resource */
     public $resource;
 
+    private modManagerDateFormatter $formatter;
+
     public function checkPermissions()
     {
         return $this->modx->hasPermission('view');
@@ -35,13 +39,16 @@ public function checkPermissions()
 
     public function getLanguageTopics()
     {
-        return ['resource'];
+        return ['resource', 'manager_log'];
     }
 
     public function initialize()
     {
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
         $id = $this->getProperty('id', false);
-        if (empty($id)) return $this->modx->lexicon('resource_err_ns');
+        if (empty($id)) {
+            return $this->modx->lexicon('resource_err_ns');
+        }
         $c = $this->modx->newQuery(modResource::class);
         $c->select([
             $this->modx->getSelectColumns(modResource::class, 'modResource'),
@@ -88,7 +95,7 @@ public function getCacheSource()
         $buffer = $this->modx->cacheManager->get($this->resource->getCacheKey(), [
             xPDO::OPT_CACHE_KEY => $this->modx->getOption('cache_resource_key', null, 'resource'),
             xPDO::OPT_CACHE_HANDLER => $this->modx->getOption('cache_resource_handler', null, $this->modx->getOption(xPDO::OPT_CACHE_HANDLER)),
-            xPDO::OPT_CACHE_FORMAT => (integer)$this->modx->getOption('cache_resource_format', null, $this->modx->getOption(xPDO::OPT_CACHE_FORMAT, null, xPDOCacheManager::CACHE_PHP)),
+            xPDO::OPT_CACHE_FORMAT => (int)$this->modx->getOption('cache_resource_format', null, $this->modx->getOption(xPDO::OPT_CACHE_FORMAT, null, xPDOCacheManager::CACHE_PHP)),
         ]);
         if ($buffer) {
             $buffer = $buffer['resource']['_content'];
@@ -98,29 +105,46 @@ public function getCacheSource()
 
     public function getChanges(array $resourceArray)
     {
-        $emptyDate = '0000-00-00 00:00:00';
-        $resourceArray['pub_date'] = !empty($resourceArray['pub_date']) && $resourceArray['pub_date'] != $emptyDate ? $resourceArray['pub_date'] : $this->modx->lexicon('none');
-        $resourceArray['unpub_date'] = !empty($resourceArray['unpub_date']) && $resourceArray['unpub_date'] != $emptyDate ? $resourceArray['unpub_date'] : $this->modx->lexicon('none');
+        $unknownUser = '(' . $this->modx->lexicon('unknown') . ')';
         $resourceArray['status'] = $resourceArray['published'] ? $this->modx->lexicon('resource_published') : $this->modx->lexicon('resource_unpublished');
 
-        $server_offset_time = floatval($this->modx->getOption('server_offset_time', null, 0)) * 3600;
-        $format = $this->modx->getOption('manager_date_format') . ' ' . $this->modx->getOption('manager_time_format');
-        $resourceArray['createdon_adjusted'] = date($format, strtotime($this->resource->get('createdon')) + $server_offset_time);
-        $resourceArray['createdon_by'] = $this->resource->get('creator');
-        if (!empty($resourceArray['editedon']) && $resourceArray['editedon'] != $emptyDate) {
-            $resourceArray['editedon_adjusted'] = date($format, strtotime($this->resource->get('editedon')) + $server_offset_time);
-            $resourceArray['editedon_by'] = $this->resource->get('editor');
-        } else {
-            $resourceArray['editedon_adjusted'] = $this->modx->lexicon('none');
-            $resourceArray['editedon_by'] = $this->modx->lexicon('none');
-        }
-        if (!empty($resourceArray['publishedon']) && $resourceArray['publishedon'] != $emptyDate) {
-            $resourceArray['publishedon_adjusted'] = date($format, strtotime($this->resource->get('publishedon')) + $server_offset_time);
-            $resourceArray['publishedon_by'] = $this->resource->get('publisher');
-        } else {
-            $resourceArray['publishedon_adjusted'] = $this->modx->lexicon('none');
-            $resourceArray['publishedon_by'] = $this->modx->lexicon('none');
-        }
+        $resourceArray['createdon_by'] = $this->resource->get('creator') ?: $unknownUser;
+        $resourceArray['createdon_adjusted'] = $this->formatter->formatResourceDate(
+            $this->resource->get('createdon'),
+            'created',
+            false
+        );
+        $resourceArray['editedon_adjusted'] = $this->formatter->formatResourceDate(
+            $this->resource->get('editedon'),
+            'edited',
+            false
+        );
+        $resourceArray['editedon_by'] = $this->formatter->isEmpty($resourceArray['editedon'])
+            ? '(' . $this->modx->lexicon('unedited') . ')'
+            : $this->resource->get('editor')
+            ;
+
+        $resourceArray['pub_date'] = $this->formatter->formatResourceDate(
+            $resourceArray['pub_date'],
+            'publish',
+            false
+        );
+        $resourceArray['unpub_date'] = $this->formatter->formatResourceDate(
+            $resourceArray['unpub_date'],
+            'unpublish',
+            false
+        );
+        $resourceArray['publishedon_adjusted'] = $this->formatter->formatResourceDate(
+            $this->resource->get('publishedon'),
+            'published',
+            false
+        );
+        $publisher = $this->resource->get('publisher') ?: $unknownUser;
+        $resourceArray['publishedon_by'] = $this->formatter->isEmpty($resourceArray['publishedon'])
+            ? '(' . $this->modx->lexicon('unpublished') . ')'
+            : $publisher
+            ;
+
         return $resourceArray;
     }
 }
diff --git a/core/src/Revolution/Processors/Resource/Event/GetList.php b/core/src/Revolution/Processors/Resource/Event/GetList.php
index c89c1ea4f3b..a6c5dc0d736 100644
--- a/core/src/Revolution/Processors/Resource/Event/GetList.php
+++ b/core/src/Revolution/Processors/Resource/Event/GetList.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of MODX Revolution.
  *
@@ -10,8 +11,9 @@
 
 namespace MODX\Revolution\Processors\Resource\Event;
 
-use MODX\Revolution\Processors\Processor;
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\modResource;
+use MODX\Revolution\Processors\Processor;
 use xPDO\Om\xPDOObject;
 
 /**
@@ -26,6 +28,8 @@
  */
 class GetList extends Processor
 {
+    private modManagerDateFormatter $formatter;
+
     public function checkPermissions()
     {
         return $this->modx->hasPermission('view_document');
@@ -38,13 +42,12 @@ public function getLanguageTopics()
 
     public function initialize()
     {
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
         $this->setDefaultProperties([
             'start' => 0,
             'limit' => 10,
             'mode' => 'pub_date',
-            'dir' => 'ASC',
-            'timeFormat' => '%a %b %d, %Y %H:%M',
-            'offset' => floatval($this->modx->getOption('server_offset_time', null, 0)) * 3600,
+            'dir' => 'ASC'
         ]);
         return true;
     }
@@ -55,7 +58,9 @@ public function process()
         $list = [];
         /** @var modResource $resource */
         foreach ($data['results'] as $resource) {
-            if (!$resource->checkPolicy('view')) continue;
+            if (!$resource->checkPolicy('view')) {
+                continue;
+            }
             $resourceArray = $this->prepareRow($resource);
             if (!empty($resourceArray)) {
                 $list[] = $resourceArray;
@@ -94,25 +99,21 @@ public function getData()
      */
     public function prepareRow(xPDOObject $object)
     {
-        $timeFormat = $this->getProperty('timeFormat', '%a %b %d, %Y');
-        $offset = $this->getProperty('offset', 0);
-
         $objectArray = $object->toArray();
+
         unset($objectArray['content']);
+        /*
+            Note that editor grids will not make use of the empty value; without doing some
+            refactoring of the MODx's datetime component, the field definition for this component
+            type must specify "date" as its field type and, by doing this, any formatting defined
+            below will be lost.
+        */
+        $pubDate = $object->get('pub_date');
+        $objectArray['pub_date'] = $this->formatter->formatDateTime($pubDate, true);
 
-        if (!in_array($object->get('pub_date'), ['', '1969-12-31 00:00:00'])) {
-            $pubDate = strtotime($object->get('pub_date')) + $offset;
-            $objectArray['pub_date'] = strftime($timeFormat, $pubDate);
-        } else {
-            $objectArray['pub_date'] = '';
-        }
+        $unpubDate = $object->get('unpub_date');
+        $objectArray['unpub_date'] = $this->formatter->formatDateTime($unpubDate,true);
 
-        if (!in_array($object->get('unpub_date'), ['', '1969-12-31 00:00:00'])) {
-            $unpubDate = strtotime($object->get('unpub_date')) + $offset;
-            $objectArray['unpub_date'] = strftime($timeFormat, $unpubDate);
-        } else {
-            $objectArray['unpub_date'] = '';
-        }
         return $objectArray;
     }
 }
diff --git a/core/src/Revolution/Processors/Resource/Trash/GetList.php b/core/src/Revolution/Processors/Resource/Trash/GetList.php
index b53838d3da7..79234f46ac6 100644
--- a/core/src/Revolution/Processors/Resource/Trash/GetList.php
+++ b/core/src/Revolution/Processors/Resource/Trash/GetList.php
@@ -11,10 +11,11 @@
 
 namespace MODX\Revolution\Processors\Resource\Trash;
 
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\modContext;
-use MODX\Revolution\Processors\Model\GetListProcessor;
 use MODX\Revolution\modResource;
 use MODX\Revolution\modUser;
+use MODX\Revolution\Processors\Model\GetListProcessor;
 use PDO;
 use xPDO\Om\xPDOObject;
 use xPDO\Om\xPDOQuery;
@@ -39,6 +40,14 @@ class GetList extends GetListProcessor
 
     public $permission = 'view';
 
+    private modManagerDateFormatter $formatter;
+
+    public function initialize()
+    {
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
+        return parent::initialize();
+    }
+
     /**
      * @param xPDOQuery $c
      * @return xPDOQuery
@@ -192,6 +201,8 @@ public function prepareRow(xPDOObject $object)
 
         $objectArray['cls'] = implode(' ', $cls);
 
+        $objectArray['deletedon'] = $this->formatter->formatDateTime($objectArray['deletedon']);
+
         return $objectArray;
     }
 }
diff --git a/core/src/Revolution/Processors/Security/Message/GetList.php b/core/src/Revolution/Processors/Security/Message/GetList.php
index 4746f3e842e..19b18d93742 100644
--- a/core/src/Revolution/Processors/Security/Message/GetList.php
+++ b/core/src/Revolution/Processors/Security/Message/GetList.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of MODX Revolution.
  *
@@ -10,10 +11,11 @@
 
 namespace MODX\Revolution\Processors\Security\Message;
 
-use MODX\Revolution\Processors\Model\GetListProcessor;
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\modUser;
 use MODX\Revolution\modUserMessage;
 use MODX\Revolution\modUserProfile;
+use MODX\Revolution\Processors\Model\GetListProcessor;
 use xPDO\Om\xPDOObject;
 use xPDO\Om\xPDOQuery;
 
@@ -32,6 +34,14 @@ class GetList extends GetListProcessor
     public $permission = 'messages';
     public $defaultSortField = 'date_sent';
 
+    private modManagerDateFormatter $formatter;
+
+    public function initialize()
+    {
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
+        return parent::initialize();
+    }
+
     /**
      * @param xPDOQuery $c
      * @return xPDOQuery
@@ -78,7 +88,7 @@ public function prepareQueryAfterCount(xPDOQuery $c)
             'recipient_username' => 'Recipient.username',
             'recipient_fullname' => 'RecipientProfile.fullname'
         ]);
-        
+
         return $c;
     }
 
@@ -89,6 +99,11 @@ public function prepareQueryAfterCount(xPDOQuery $c)
     public function prepareRow(xPDOObject $object)
     {
         $objectArray = $object->toArray();
+
+        if (array_key_exists('date_sent', $objectArray)) {
+            $objectArray['date_sent'] = $this->formatter->formatDateTime($objectArray['date_sent']);
+        }
+
         $objectArray['sender_name'] = $object->get('sender_fullname') . " ({$object->get('sender_username')})";
         $objectArray['recipient_name'] = $object->get('recipient_fullname') . " ({$object->get('recipient_username')})";
         $objectArray['read'] = $object->get('read') ? true : false;
diff --git a/core/src/Revolution/Processors/Security/Profile/Get.php b/core/src/Revolution/Processors/Security/Profile/Get.php
index 59775bbe45d..5ab425f6a8f 100644
--- a/core/src/Revolution/Processors/Security/Profile/Get.php
+++ b/core/src/Revolution/Processors/Security/Profile/Get.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of MODX Revolution.
  *
@@ -10,11 +11,12 @@
 
 namespace MODX\Revolution\Processors\Security\Profile;
 
-use MODX\Revolution\Processors\Processor;
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\modUser;
 use MODX\Revolution\modUserGroup;
 use MODX\Revolution\modUserGroupMember;
 use MODX\Revolution\modUserGroupRole;
+use MODX\Revolution\Processors\Processor;
 
 /**
  * Get a user profile
@@ -26,6 +28,8 @@ class Get extends Processor
     /** @var modUser $user */
     public $user;
 
+    private modManagerDateFormatter $formatter;
+
     /**
      * @return bool
      */
@@ -51,6 +55,7 @@ public function initialize()
         if (!$this->user) {
             return $this->modx->lexicon('user_err_not_found');
         }
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
         return true;
     }
 
@@ -67,12 +72,10 @@ public function process()
             $userArray = array_merge($profile->toArray(), $userArray);
         }
 
-        $userArray['dob'] = !empty($userArray['dob']) ? date('m/d/Y', $userArray['dob']) : '';
-        $userArray['blockeduntil'] = !empty($userArray['blockeduntil']) ? date('m/d/Y h:i A',
-            $userArray['blockeduntil']) : '';
-        $userArray['blockedafter'] = !empty($userArray['blockedafter']) ? date('m/d/Y h:i A',
-            $userArray['blockedafter']) : '';
-        $userArray['lastlogin'] = !empty($userArray['lastlogin']) ? date('m/d/Y', $userArray['lastlogin']) : '';
+        $userArray['dob'] = !empty($userArray['dob']) ? date('Y-m-d', $userArray['dob']) : '';
+        $userArray['blockeduntil'] = $this->formatter->formatHidden($userArray['blockeduntil']);
+        $userArray['blockedafter'] = $this->formatter->formatHidden($userArray['blockedafter']);
+        $userArray['lastlogin'] = $this->formatter->formatDateTime($userArray['lastlogin'], false, '');
 
         unset($userArray['password'], $userArray['cachepwd'], $userArray['sessionid'], $userArray['salt']);
         return $this->success('', $userArray);
diff --git a/core/src/Revolution/Processors/Security/User/Get.php b/core/src/Revolution/Processors/Security/User/Get.php
index fa746b8ea94..98e86362546 100644
--- a/core/src/Revolution/Processors/Security/User/Get.php
+++ b/core/src/Revolution/Processors/Security/User/Get.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of MODX Revolution.
  *
@@ -10,11 +11,12 @@
 
 namespace MODX\Revolution\Processors\Security\User;
 
-use MODX\Revolution\Processors\Model\GetProcessor;
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\modUser;
 use MODX\Revolution\modUserGroup;
 use MODX\Revolution\modUserGroupMember;
 use MODX\Revolution\modUserGroupRole;
+use MODX\Revolution\Processors\Model\GetProcessor;
 
 /**
  * Get a user
@@ -28,6 +30,14 @@ class Get extends GetProcessor
     public $permission = 'view_user';
     public $objectType = 'user';
 
+    private modManagerDateFormatter $formatter;
+
+    public function initialize()
+    {
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
+        return parent::initialize();
+    }
+
     /**
      * @throws \xPDO\xPDOException
      */
@@ -91,13 +101,11 @@ public function cleanup()
             $userArray = array_merge($profile->toArray(), $userArray);
         }
 
-        $userArray['dob'] = !empty($userArray['dob']) ? date('m/d/Y', $userArray['dob']) : '';
-        $userArray['blockeduntil'] = !empty($userArray['blockeduntil']) ? date('Y-m-d H:i:s',
-            $userArray['blockeduntil']) : '';
-        $userArray['blockedafter'] = !empty($userArray['blockedafter']) ? date('Y-m-d H:i:s',
-            $userArray['blockedafter']) : '';
-        $userArray['lastlogin'] = !empty($userArray['lastlogin']) ? date($this->modx->getOption('manager_date_format') . ', ' . $this->modx->getOption('manager_time_format'),
-            $userArray['lastlogin']) : '';
+        $userArray['dob'] = !empty($userArray['dob']) ? date('Y-m-d', $userArray['dob']) : '';
+        $userArray['blockeduntil'] = $this->formatter->formatHidden($userArray['blockeduntil']);
+        $userArray['blockedafter'] = $this->formatter->formatHidden($userArray['blockedafter']);
+        $userArray['createdon'] = $this->formatter->formatDateTime($userArray['createdon']);
+        $userArray['lastlogin'] = !empty($userArray['lastlogin']) ? $this->formatter->formatDateTime($userArray['lastlogin']) : '';
 
         unset($userArray['password'], $userArray['cachepwd'], $userArray['sessionid'], $userArray['salt']);
         return $this->success('', $userArray);
diff --git a/core/src/Revolution/Processors/Security/User/GetOnline.php b/core/src/Revolution/Processors/Security/User/GetOnline.php
index 6d0023855f9..b60d3cbd54d 100644
--- a/core/src/Revolution/Processors/Security/User/GetOnline.php
+++ b/core/src/Revolution/Processors/Security/User/GetOnline.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of MODX Revolution.
  *
@@ -12,13 +13,14 @@
 
 use DateInterval;
 use DateTime;
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\modManagerLog;
-use MODX\Revolution\Processors\Model\GetListProcessor;
 use MODX\Revolution\modUser;
 use MODX\Revolution\modUserGroup;
+use MODX\Revolution\Processors\Model\GetListProcessor;
 use PDO;
-use xPDO\Om\xPDOQuery;
 use xPDO\Om\xPDOObject;
+use xPDO\Om\xPDOQuery;
 
 /**
  * Gets a list of all users who are online
@@ -30,6 +32,14 @@ class GetOnline extends GetListProcessor
     public $defaultSortField = 'occurred';
     public $defaultSortDirection = 'desc';
 
+    private modManagerDateFormatter $formatter;
+
+    public function initialize()
+    {
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
+        return parent::initialize();
+    }
+
     /**
      * @param xPDOQuery $c
      * @return xPDOQuery
@@ -70,9 +80,14 @@ public function prepareRow(xPDOObject $object)
     {
         $row = $object->toArray();
 
+        $row['occurred_date'] = $this->formatter->formatDate($row['occurred']);
+        $row['occurred_time'] = $this->formatter->formatTime($row['occurred']);
+        $row['occurred'] = $this->formatter->formatDateTime($row['occurred']);
+
         /** @var modUser $user */
         if ($user = $object->getOne('User')) {
-            $row = array_merge($row,
+            $row = array_merge(
+                $row,
                 $user->get(['username']),
                 $user->Profile->get(['fullname', 'email']),
                 ['photo' => $user->getPhoto(64, 64)]
diff --git a/core/src/Revolution/Processors/Security/User/GetRecentlyEditedResources.php b/core/src/Revolution/Processors/Security/User/GetRecentlyEditedResources.php
index d1dd77078d0..f2a8955cb4e 100644
--- a/core/src/Revolution/Processors/Security/User/GetRecentlyEditedResources.php
+++ b/core/src/Revolution/Processors/Security/User/GetRecentlyEditedResources.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of MODX Revolution.
  *
@@ -10,12 +11,12 @@
 
 namespace MODX\Revolution\Processors\Security\User;
 
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\modManagerLog;
-use MODX\Revolution\Processors\Model\GetListProcessor;
 use MODX\Revolution\modResource;
 use MODX\Revolution\modUser;
 use MODX\Revolution\modUserGroup;
-use PDO;
+use MODX\Revolution\Processors\Model\GetListProcessor;
 use xPDO\Om\xPDOObject;
 use xPDO\Om\xPDOQuery;
 
@@ -37,20 +38,21 @@ class GetRecentlyEditedResources extends GetListProcessor
     public $defaultSortDirection = 'DESC';
     protected $classKeys = [];
 
+    private modManagerDateFormatter $formatter;
+
     /**
      * @return bool|null|string
      */
     public function initialize()
     {
         $this->setDefaultProperties(['limit' => 10]);
-
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
         $this->classKeys = $this->modx->getDescendants(modResource::class);
         $this->classKeys[] = modResource::class;
 
         return parent::initialize();
     }
 
-
     /**
      * Filter resources by user
      * @param xPDOQuery $c
@@ -96,27 +98,20 @@ public function prepareRow(xPDOObject $object)
         $resourceArray = $resource->get(['id','pagetitle','description','published','deleted','context_key', 'createdon', 'editedon']);
         $resourceArray['pagetitle'] = htmlspecialchars($resourceArray['pagetitle'], ENT_QUOTES, $this->modx->getOption('modx_charset', null, 'UTF-8'));
 
-        $dateFormat = $this->modx->getOption('manager_date_format');
-        $timeFormat = $this->modx->getOption('manager_time_format');
-
-        $createdon = new \DateTimeImmutable($resourceArray['createdon']);
-        $resourceArray['createdon_date'] = $createdon->format($dateFormat);
-        $resourceArray['createdon_time'] = $createdon->format($timeFormat);
-
-        $resourceArray['editedon_date'] = $resourceArray['createdon_date'];
-        $resourceArray['editedon_time'] = $resourceArray['createdon_time'];
-
-        if (!empty($resourceArray['editedon'])) {
-            $editedon = new \DateTimeImmutable($resourceArray['editedon']);
-            $resourceArray['editedon_date'] = $editedon->format($dateFormat);
-            $resourceArray['editedon_time'] = $editedon->format($timeFormat);
-        }
+        $editedon = !empty($resourceArray['editedon']) ? $resourceArray['editedon'] : $resourceArray['createdon'] ;
+        $isUnedited = $editedon === $resourceArray['createdon'];
+        $resourceArray['createdon_date'] = $this->formatter->formatDate($resourceArray['createdon']);
+        $resourceArray['createdon_time'] = $this->formatter->formatTime($resourceArray['createdon']);
+        $resourceArray['editedon_date'] = $isUnedited ? $resourceArray['createdon_date'] : $this->formatter->formatDate($editedon);
+        $resourceArray['editedon_time'] = $isUnedited ? $resourceArray['createdon_time'] : $this->formatter->formatTime($editedon);
+        $row['occurred'] = $this->formatter->formatDateTime($row['occurred']);
 
         $row = array_merge($row, $resourceArray);
 
         /** @var modUser $user */
         if ($user = $object->getOne('User')) {
-            $row = array_merge($row,
+            $row = array_merge(
+                $row,
                 $user->get(['username']),
                 $user->Profile->get(['fullname', 'email']),
                 ['photo' => $user->getPhoto(64, 64)]
diff --git a/core/src/Revolution/Processors/Security/User/Validation.php b/core/src/Revolution/Processors/Security/User/Validation.php
index e1d27fb6bc4..bf0ac721563 100644
--- a/core/src/Revolution/Processors/Security/User/Validation.php
+++ b/core/src/Revolution/Processors/Security/User/Validation.php
@@ -74,8 +74,8 @@ public function alreadyExists($name)
             modUser::class,
             [
                 'username' => $name,
-                'id:!=' => $this->user->get('id'),
-                                     ]
+                'id:!=' => $this->user->get('id')
+            ]
         ) > 0;
     }
 
diff --git a/core/src/Revolution/Processors/System/ActiveResource/GetList.php b/core/src/Revolution/Processors/System/ActiveResource/GetList.php
index 599b292e39b..564e405e8b1 100644
--- a/core/src/Revolution/Processors/System/ActiveResource/GetList.php
+++ b/core/src/Revolution/Processors/System/ActiveResource/GetList.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of MODX Revolution.
  *
@@ -10,9 +11,10 @@
 
 namespace MODX\Revolution\Processors\System\ActiveResource;
 
-use MODX\Revolution\Processors\Model\GetListProcessor;
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\modResource;
 use MODX\Revolution\modUser;
+use MODX\Revolution\Processors\Model\GetListProcessor;
 use xPDO\Om\xPDOObject;
 use xPDO\Om\xPDOQuery;
 
@@ -22,8 +24,8 @@
  * @param integer $limit (optional) The number of records to limit to. Defaults to 10.
  * @param string $sort (optional) The column to sort by. Defaults to name.
  * @param string $dir (optional) The direction of the sort. Defaults to ASC.
- * @param string $dateFormat (optional) The strftime date format to format the
- * editedon date to. Defaults to: %b %d, %Y %I:%M %p
+ * @param string $dateFormat (optional) The datetime format to format the editedon date to.
+ * Defaults to the manager's combined date, separator, and time format settings.
  * @package MODX\Revolution\Processors\System\ActiveResource
  */
 class GetList extends GetListProcessor
@@ -34,6 +36,8 @@ class GetList extends GetListProcessor
     public $defaultSortField = 'editedon';
     public $defaultSortDirection = 'DESC';
 
+    private modManagerDateFormatter $formatter;
+
     /**
      * @return bool
      */
@@ -50,15 +54,16 @@ public function getLanguageTopics()
         return ['resource'];
     }
 
-    /**
+     /**
      * {@inheritDoc}
      * @return boolean
      */
     public function initialize()
     {
         $initialized = parent::initialize();
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
         $this->setDefaultProperties([
-            'dateFormat' => '%b %d, %Y %I:%M %p',
+            'dateFormat' => '',
         ]);
         return $initialized;
     }
@@ -100,7 +105,12 @@ public function prepareRow(xPDOObject $object)
             'editedon',
             'username',
         ]);
-        $objectArray['editedon'] = strftime($this->getProperty('dateFormat'), strtotime($object->get('editedon')));
+        $customFormat = $this->getProperty('dateFormat');
+        $editedOn = $object->get('editedon');
+        $objectArray['editedon'] =  !empty($customFormat)
+            ? $this->formatter->format($editedOn, $customFormat)
+            : $this->formatter->formatDateTime($editedOn)
+            ;
 
         return $objectArray;
     }
diff --git a/core/src/Revolution/Processors/System/Dashboard/Widget/Feed.php b/core/src/Revolution/Processors/System/Dashboard/Widget/Feed.php
index 8db6d363b05..d32f6acb58b 100644
--- a/core/src/Revolution/Processors/System/Dashboard/Widget/Feed.php
+++ b/core/src/Revolution/Processors/System/Dashboard/Widget/Feed.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of MODX Revolution.
  *
@@ -10,9 +11,10 @@
 
 namespace MODX\Revolution\Processors\System\Dashboard\Widget;
 
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\modChunk;
-use MODX\Revolution\Processors\Processor;
 use MODX\Revolution\modX;
+use MODX\Revolution\Processors\Processor;
 use SimplePie_Item;
 use xPDO\xPDO;
 
@@ -24,6 +26,14 @@
  */
 class Feed extends Processor
 {
+    private modManagerDateFormatter $formatter;
+
+    public function initialize()
+    {
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
+        return parent::initialize();
+    }
+
     /**
      * @return array|mixed|string
      */
@@ -74,18 +84,21 @@ public function loadFeed($url)
         $feed->handle_content_type();
 
         if ($feed->error()) {
-            $this->modx->log(modX::LOG_LEVEL_ERROR,
-                is_array($feed->error()) ? print_r($feed->error(), true) : $feed->error());
+            $this->modx->log(
+                modX::LOG_LEVEL_ERROR,
+                is_array($feed->error()) ? print_r($feed->error(), true) : $feed->error()
+            );
         }
 
         $output = [];
         /** @var SimplePie_Item $item */
         foreach ($feed->get_items() as $item) {
+            $date = $item->get_date('Y-m-d H:i:s');
             $output[] = $this->getFileChunk('dashboard/rssitem.tpl', [
                 'title' => $item->get_title(),
                 'description' => $item->get_description(),
                 'link' => $item->get_permalink(),
-                'pubdate' => $item->get_date(),
+                'pubdate' => $this->formatter->formatDateTime($date)
             ]);
         }
 
@@ -103,8 +116,7 @@ public function getFileChunk($tpl, array $placeholders = [])
         $file = $tpl;
 
         if (!file_exists($file)) {
-            $file = $this->modx->getOption('manager_path') . 'templates/' . $this->modx->getOption('manager_theme',
-                    null, 'default') . '/' . $tpl;
+            $file = $this->modx->getOption('manager_path') . 'templates/' . $this->modx->getOption('manager_theme', null, 'default') . '/' . $tpl;
         }
         if (!file_exists($file)) {
             $file = $this->modx->getOption('manager_path') . 'templates/default/' . $tpl;
@@ -126,7 +138,7 @@ public function getFileChunk($tpl, array $placeholders = [])
      *
      * @return array The proxy configuration.
      */
-    private function buildProxyOptions() 
+    private function buildProxyOptions()
     {
         $config = [];
         $proxyHost = $this->modx->getOption('proxy_host', null, '');
diff --git a/core/src/Revolution/Processors/System/Log/GetList.php b/core/src/Revolution/Processors/System/Log/GetList.php
index e20a4b4d097..6558be5951b 100644
--- a/core/src/Revolution/Processors/System/Log/GetList.php
+++ b/core/src/Revolution/Processors/System/Log/GetList.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of MODX Revolution.
  *
@@ -10,13 +11,13 @@
 
 namespace MODX\Revolution\Processors\System\Log;
 
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\modCategory;
 use MODX\Revolution\modContext;
 use MODX\Revolution\modContextSetting;
 use MODX\Revolution\modDocument;
-use MODX\Revolution\modMenu;
-use MODX\Revolution\Processors\Processor;
 use MODX\Revolution\modManagerLog;
+use MODX\Revolution\modMenu;
 use MODX\Revolution\modResource;
 use MODX\Revolution\modStaticResource;
 use MODX\Revolution\modSymLink;
@@ -25,6 +26,7 @@
 use MODX\Revolution\modUser;
 use MODX\Revolution\modUserSetting;
 use MODX\Revolution\modWebLink;
+use MODX\Revolution\Processors\Processor;
 use xPDO\Om\xPDOObject;
 
 /**
@@ -39,6 +41,8 @@
  */
 class GetList extends Processor
 {
+    private modManagerDateFormatter $formatter;
+
     /**
      * @return bool
      */
@@ -52,6 +56,7 @@ public function checkPermissions()
      */
     public function initialize()
     {
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
         $this->setDefaultProperties([
             'limit' => 20,
             'start' => 0,
@@ -61,7 +66,7 @@ public function initialize()
             'actionType' => false,
             'dateStart' => false,
             'dateEnd' => false,
-            'dateFormat' => $this->modx->getOption('manager_date_format') . ', ' . $this->modx->getOption('manager_time_format'),
+            'dateFormat' => '',
         ]);
         return true;
     }
@@ -185,8 +190,8 @@ public function prepareLog(modManagerLog $log)
             // Action is prefixed with a namespace, assume we need to load a package
             $exp = explode('.', $logArray['action']);
             $ns = $exp[0];
-            $path = $this->modx->getOption("{$ns}.core_path", null,
-                    $this->modx->getOption('core_path') . "components/{$ns}/") . 'model/';
+            $nsCorePath = $this->modx->getOption('core_path') . "components/{$ns}/";
+            $path = $this->modx->getOption("{$ns}.core_path", null, $nsCorePath) . 'model/';
             $this->modx->addPackage($ns, $path);
         }
         if (!empty($logArray['classKey']) && !empty($logArray['item'])) {
@@ -204,7 +209,11 @@ public function prepareLog(modManagerLog $log)
         } else {
             $logArray['name'] = $log->get('item');
         }
-        $logArray['occurred'] = date($this->getProperty('dateFormat'), strtotime($logArray['occurred']));
+        $customFormat = $this->getProperty('dateFormat');
+        $logArray['occurred'] = !empty($customFormat)
+            ? $this->formatter->format($logArray['occurred'], $customFormat)
+            : $this->formatter->formatDateTime($logArray['occurred'])
+            ;
 
         return $logArray;
     }
@@ -245,8 +254,7 @@ public function getNameField($classKey)
             case modUserSetting::class:
                 $field = 'key';
                 break;
-            default:
-                break;
+            // no default
         }
         return $field;
     }
diff --git a/core/src/Revolution/Processors/System/Settings/GetList.php b/core/src/Revolution/Processors/System/Settings/GetList.php
index 6e855d70e4b..d00ba0309dc 100644
--- a/core/src/Revolution/Processors/System/Settings/GetList.php
+++ b/core/src/Revolution/Processors/System/Settings/GetList.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of MODX Revolution.
  *
@@ -10,9 +11,10 @@
 
 namespace MODX\Revolution\Processors\System\Settings;
 
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\modNamespace;
-use MODX\Revolution\Processors\Model\GetListProcessor;
 use MODX\Revolution\modSystemSetting;
+use MODX\Revolution\Processors\Model\GetListProcessor;
 use xPDO\Om\xPDOObject;
 use xPDO\Om\xPDOQuery;
 
@@ -33,17 +35,20 @@ class GetList extends GetListProcessor
     public $permission = 'settings';
     public $defaultSortField = 'key';
 
+    private modManagerDateFormatter $formatter;
+
     /**
      * @return bool
      */
     public function initialize()
     {
         $initialized = parent::initialize();
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
         $this->setDefaultProperties([
             'key' => false,
             'namespace' => false,
             'area' => false,
-            'dateFormat' => $this->modx->getOption('manager_date_format') . ', ' . $this->modx->getOption('manager_time_format'),
+            'dateFormat' => ''
         ]);
 
         return $initialized;
@@ -113,9 +118,14 @@ public function prepareRow(xPDOObject $object)
         $k = 'setting_' . $settingArray['key'];
 
         /* if 3rd party setting, load proper text, fallback to english */
-        $this->modx->lexicon->load('en:' . $object->get('namespace') . ':default',
-            'en:' . $object->get('namespace') . ':setting');
-        $this->modx->lexicon->load($object->get('namespace') . ':default', $object->get('namespace') . ':setting');
+        $this->modx->lexicon->load(
+            'en:' . $object->get('namespace') . ':default',
+            'en:' . $object->get('namespace') . ':setting'
+        );
+        $this->modx->lexicon->load(
+            $object->get('namespace') . ':default',
+            $object->get('namespace') . ':setting'
+        );
 
         /* get translated area text */
         if ($this->modx->lexicon->exists('area_' . $object->get('area'))) {
@@ -145,19 +155,25 @@ public function prepareRow(xPDOObject $object)
         } else {
             $settingArray['name'] = $settingArray['name_trans'];
         }
-        $settingArray['key'] = htmlspecialchars($settingArray['key'], ENT_QUOTES,
-            $this->modx->getOption('modx_charset', null, 'UTF-8'));
-        $settingArray['name_trans'] = htmlspecialchars($settingArray['name_trans'], ENT_QUOTES,
-            $this->modx->getOption('modx_charset', null, 'UTF-8'));
+        $settingArray['key'] = htmlspecialchars(
+            $settingArray['key'],
+            ENT_QUOTES,
+            $this->modx->getOption('modx_charset', null, 'UTF-8')
+        );
+        $settingArray['name_trans'] = htmlspecialchars(
+            $settingArray['name_trans'],
+            ENT_QUOTES,
+            $this->modx->getOption('modx_charset', null, 'UTF-8')
+        );
 
         $settingArray['oldkey'] = $settingArray['key'];
 
-        $settingArray['editedon'] = in_array($object->get('editedon'), [
-                '-001-11-30 00:00:00',
-                '-1-11-30 00:00:00',
-                '0000-00-00 00:00:00',
-                null
-            ]) ? '' : date($this->getProperty('dateFormat'), strtotime($object->get('editedon')));
+        $customFormat = $this->getProperty('dateFormat');
+        $editedOn = $object->get('editedon');
+        $settingArray['editedon'] =  !empty($customFormat)
+            ? $this->formatter->format($editedOn, $customFormat)
+            : $this->formatter->formatDateTime($editedOn)
+            ;
 
         return $settingArray;
     }
diff --git a/core/src/Revolution/Processors/Workspace/Lexicon/GetList.php b/core/src/Revolution/Processors/Workspace/Lexicon/GetList.php
index f2e874e510f..39ac2efb410 100644
--- a/core/src/Revolution/Processors/Workspace/Lexicon/GetList.php
+++ b/core/src/Revolution/Processors/Workspace/Lexicon/GetList.php
@@ -11,6 +11,7 @@
 
 namespace MODX\Revolution\Processors\Workspace\Lexicon;
 
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\modLexiconEntry;
 use MODX\Revolution\Processors\Processor;
 
@@ -25,6 +26,8 @@
  */
 class GetList extends Processor
 {
+    private modManagerDateFormatter $formatter;
+
     /**
      * @return bool
      */
@@ -65,6 +68,7 @@ public function initialize()
         if ($this->getProperty('topic') === '') {
             $this->setProperty('topic', 'default');
         }
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
         return true;
     }
 
@@ -137,6 +141,7 @@ function parseArray($needle, array $haystack = [])
         /* loop through */
         $list = [];
         foreach ($entries as $name => $value) {
+            $editedOn = null;
             $entryArray = [
                 'name' => $name,
                 'value' => $value,
@@ -152,10 +157,10 @@ function parseArray($needle, array $haystack = [])
                 foreach ($dbEntries[$name] as $k => $v) {
                     $entryArray[$k] = $v; // array_merge very slow inside loop, don't use it here
                 }
-
-                $entryArray['editedon'] = strtotime($entryArray['editedon']) ?: strtotime($entryArray['createdon']);
+                $editedOn = $entryArray['editedon'] ?: $entryArray['createdon'] ;
                 $entryArray['overridden'] = 1;
             }
+            $entryArray['editedon'] = $this->formatter->formatDateTime($editedOn);
             $list[] = $entryArray;
         }
 
diff --git a/core/src/Revolution/Processors/Workspace/Packages/Get.php b/core/src/Revolution/Processors/Workspace/Packages/Get.php
index 9243a103980..ec13fd43382 100644
--- a/core/src/Revolution/Processors/Workspace/Packages/Get.php
+++ b/core/src/Revolution/Processors/Workspace/Packages/Get.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of MODX Revolution.
  *
@@ -10,6 +11,7 @@
 
 namespace MODX\Revolution\Processors\Workspace\Packages;
 
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\Processors\Model\GetProcessor;
 use MODX\Revolution\Transport\modTransportPackage;
 use MODX\Revolution\Transport\modTransportProvider;
@@ -29,23 +31,21 @@ class Get extends GetProcessor
     public $primaryKeyField = 'signature';
     public $checkViewPermission = false;
 
-    /** @var string $dateFormat */
-    public $dateFormat = '%b %d, %Y %I:%M %p';
-
     /** @var modTransportProvider $provider */
     public $provider;
 
     /** @var modTransportPackage $object */
     public $object;
 
+    private modManagerDateFormatter $formatter;
+
     /**
      * @return bool
      */
     public function initialize()
     {
         $this->modx->addPackage('Revolution\Transport', MODX_CORE_PATH . 'src/');
-        $this->dateFormat = $this->getProperty('dateFormat',
-            $this->modx->getOption('manager_date_format') . ', ' . $this->modx->getOption('manager_time_format'));
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
         return parent::initialize();
     }
 
@@ -83,19 +83,17 @@ public function getMetadata()
      */
     public function formatDates(array $packageArray)
     {
-        $updated = $this->object->get('updated');
-        if ($updated !== '0000-00-00 00:00:00' && $updated !== null) {
-            $packageArray['updated'] = date($this->dateFormat, strtotime($updated));
-        } else {
-            $packageArray['updated'] = '';
-        }
-        $packageArray['created'] = date($this->dateFormat, strtotime($this->object->get('created')));
-        $installed = $this->object->get('installed');
-        if ($installed === null || $installed === '0000-00-00 00:00:00') {
-            $packageArray['installed'] = null;
-        } else {
-            $packageArray['installed'] = date($this->dateFormat, strtotime($installed));
-        }
+        $packageArray['created'] = $this->formatter->formatPackageDate($this->object->get('created'));
+        $packageArray['installed'] = $this->formatter->formatPackageDate(
+            $this->object->get('installed'),
+            'installed',
+            false
+        );
+        $packageArray['updated'] = $this->formatter->formatPackageDate(
+            $this->object->get('updated'),
+            'updated',
+            false
+        );
         return $packageArray;
     }
 }
diff --git a/core/src/Revolution/Processors/Workspace/Packages/GetList.php b/core/src/Revolution/Processors/Workspace/Packages/GetList.php
index a48d48c1af7..b0e040a47be 100644
--- a/core/src/Revolution/Processors/Workspace/Packages/GetList.php
+++ b/core/src/Revolution/Processors/Workspace/Packages/GetList.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of MODX Revolution.
  *
@@ -10,6 +11,7 @@
 
 namespace MODX\Revolution\Processors\Workspace\Packages;
 
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\Processors\Model\GetListProcessor;
 use MODX\Revolution\Transport\modTransportPackage;
 use MODX\Revolution\Transport\modTransportProvider;
@@ -42,17 +44,19 @@ class GetList extends GetListProcessor
     /** @var array $providerCache */
     public $providerCache = [];
 
+    private modManagerDateFormatter $formatter;
+
     /**
      * @return bool
      */
     public function initialize()
     {
         $this->modx->addPackage('Revolution\Transport', MODX_CORE_PATH . 'src/');
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
         $this->setDefaultProperties([
             'start' => 0,
             'limit' => 10,
             'workspace' => 1,
-            'dateFormat' => $this->modx->getOption('manager_date_format') . ', ' . $this->modx->getOption('manager_time_format'),
             'query' => '',
         ]);
         return true;
@@ -141,20 +145,18 @@ public function getVersionInfo(array $packageArray)
      */
     public function formatDates(array $packageArray)
     {
-        if ($packageArray['updated'] !== '0000-00-00 00:00:00' && $packageArray['updated'] !== null) {
-            $packageArray['updated'] = utf8_encode(date($this->getProperty('dateFormat'),
-                strtotime($packageArray['updated'])));
-        } else {
-            $packageArray['updated'] = '';
-        }
-        $packageArray['created'] = utf8_encode(date($this->getProperty('dateFormat'),
-            strtotime($packageArray['created'])));
-        if ($packageArray['installed'] === null || $packageArray['installed'] === '0000-00-00 00:00:00') {
-            $packageArray['installed'] = null;
-        } else {
-            $packageArray['installed'] = utf8_encode(date($this->getProperty('dateFormat'),
-                strtotime($packageArray['installed'])));
-        }
+        $packageArray['created'] = $this->formatter->formatPackageDate($packageArray['created']);
+        $packageArray['installed'] = $this->formatter->formatPackageDate(
+            $packageArray['installed'],
+            'installed',
+            false
+        );
+        $packageArray['updated'] = $this->formatter->formatPackageDate(
+            $packageArray['updated'],
+            'updated',
+            false
+        );
+
         return $packageArray;
     }
 
@@ -197,9 +199,16 @@ public function checkForUpdates(modTransportPackage $package, array $packageArra
         if ($package->get('provider') > 0 && $this->modx->getOption('auto_check_pkg_updates', null, false)) {
             $updateCacheKey = 'mgr/providers/updates/' . $package->get('provider') . '/' . $package->get('signature');
             $updateCacheOptions = [
-                xPDO::OPT_CACHE_KEY => $this->modx->cacheManager->getOption('cache_packages_key', null, 'packages'),
-                xPDO::OPT_CACHE_HANDLER => $this->modx->cacheManager->getOption('cache_packages_handler', null,
-                    $this->modx->cacheManager->getOption(xPDO::OPT_CACHE_HANDLER)),
+                xPDO::OPT_CACHE_KEY => $this->modx->cacheManager->getOption(
+                    'cache_packages_key',
+                    null,
+                    'packages'
+                ),
+                xPDO::OPT_CACHE_HANDLER => $this->modx->cacheManager->getOption(
+                    'cache_packages_handler',
+                    null,
+                    $this->modx->cacheManager->getOption(xPDO::OPT_CACHE_HANDLER)
+                )
             ];
             $updates = $this->modx->cacheManager->get($updateCacheKey, $updateCacheOptions);
             if (empty($updates)) {
@@ -220,8 +229,7 @@ public function checkForUpdates(modTransportPackage $package, array $packageArra
                     } else {
                         $updates = ['count' => count($updates)];
                     }
-                    $this->modx->cacheManager->set($updateCacheKey, $updates, $this->updatesCacheExpire,
-                        $updateCacheOptions);
+                    $this->modx->cacheManager->set($updateCacheKey, $updates, $this->updatesCacheExpire, $updateCacheOptions);
                 }
             }
         }
diff --git a/core/src/Revolution/Processors/Workspace/Packages/Version/GetList.php b/core/src/Revolution/Processors/Workspace/Packages/Version/GetList.php
index d8d332e233f..b32b184dff6 100644
--- a/core/src/Revolution/Processors/Workspace/Packages/Version/GetList.php
+++ b/core/src/Revolution/Processors/Workspace/Packages/Version/GetList.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of MODX Revolution.
  *
@@ -10,6 +11,7 @@
 
 namespace MODX\Revolution\Processors\Workspace\Packages\Version;
 
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\Processors\Model\GetListProcessor;
 use MODX\Revolution\Transport\modTransportPackage;
 use xPDO\Om\xPDOObject;
@@ -28,17 +30,19 @@ class GetList extends GetListProcessor
     public $permission = 'packages';
     public $languageTopics = ['workspace'];
 
+    private modManagerDateFormatter $formatter;
+
     /**
      * @return bool
      */
     public function initialize()
     {
         $this->modx->addPackage('Revolution\Transport', MODX_CORE_PATH . 'src/');
+        $this->formatter = $this->modx->services->get(modManagerDateFormatter::class);
         $this->setDefaultProperties([
             'limit' => 10,
             'start' => 0,
             'workspace' => 1,
-            'dateFormat' => $this->modx->getOption('manager_date_format') . ', ' . $this->modx->getOption('manager_time_format'),
             'signature' => false,
         ]);
         return parent::initialize();
@@ -57,8 +61,11 @@ public function getData()
             'package_name' => urldecode($this->getProperty('package_name', $signatureArray[0])),
         ];
         $limit = $this->getProperty('limit');
-        $pkgList = $this->modx->call(modTransportPackage::class, 'listPackageVersions',
-            [&$this->modx, $criteria, $limit > 0 ? $limit : 0, $this->getProperty('start')]);
+        $pkgList = $this->modx->call(
+            modTransportPackage::class,
+            'listPackageVersions',
+            [&$this->modx, $criteria, $limit > 0 ? $limit : 0, $this->getProperty('start')]
+        );
         $data['results'] = $pkgList['collection'];
         $data['total'] = $pkgList['total'];
         return $data;
@@ -110,19 +117,18 @@ public function parseVersion(modTransportPackage $package, array $packageArray)
      */
     public function formatDates(modTransportPackage $package, array $packageArray)
     {
-        $updated = $package->get('updated');
-        if ($updated !== '0000-00-00 00:00:00' && $updated !== null) {
-            $packageArray['updated'] = date($this->getProperty('dateFormat'), strtotime($updated));
-        } else {
-            $packageArray['updated'] = '';
-        }
-        $packageArray['created'] = date($this->getProperty('dateFormat'), strtotime($package->get('created')));
-        $installed = $package->get('installed');
-        if ($installed === null || $installed === '0000-00-00 00:00:00') {
-            $packageArray['installed'] = null;
-        } else {
-            $packageArray['installed'] = date($this->getProperty('dateFormat'), strtotime($installed));
-        }
+        $packageArray['created'] = $this->formatter->formatPackageDate($package->get('created'));
+        $packageArray['installed'] = $this->formatter->formatPackageDate(
+            $package->get('installed'),
+            'installed',
+            false
+        );
+        $packageArray['updated'] = $this->formatter->formatPackageDate(
+            $package->get('updated'),
+            'updated',
+            false
+        );
+
         return $packageArray;
     }
 
@@ -137,8 +143,11 @@ public function getMetaData(modTransportPackage $package, array $packageArray)
         if (!empty($metadata)) {
             foreach ($metadata as $row) {
                 if (!empty($row['name']) && $row['name'] === 'description') {
-                    $packageArray['readme'] = str_replace([PHP_EOL, '<br /><br />'], ['', '<br />'],
-                        nl2br($row['text']));
+                    $packageArray['readme'] = str_replace(
+                        [PHP_EOL, '<br /><br />'],
+                        ['', '<br />'],
+                        nl2br($row['text'])
+                    );
                     break;
                 }
             }
@@ -147,8 +156,11 @@ public function getMetaData(modTransportPackage $package, array $packageArray)
             $transport = $package->getTransport();
             if ($transport) {
                 $packageArray['readme'] = $transport->getAttribute('readme');
-                $packageArray['readme'] = str_replace([PHP_EOL, '<br /><br />'], ['', '<br />'],
-                    nl2br($packageArray['readme']));
+                $packageArray['readme'] = str_replace(
+                    [PHP_EOL, '<br /><br />'],
+                    ['', '<br />'],
+                    nl2br($packageArray['readme'])
+                );
             }
         }
         unset($packageArray['attributes'], $packageArray['metadata'], $packageArray['manifest']);
diff --git a/core/src/Revolution/modX.php b/core/src/Revolution/modX.php
index f12942d0a93..db899c786de 100644
--- a/core/src/Revolution/modX.php
+++ b/core/src/Revolution/modX.php
@@ -13,6 +13,7 @@
 use Exception;
 use GuzzleHttp\Client;
 use GuzzleHttp\Psr7\HttpFactory;
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\Services\Container;
 use MODX\Revolution\Error\modError;
 use MODX\Revolution\Error\modErrorHandler;
@@ -584,6 +585,8 @@ public function initialize($contextKey= 'web', $options = null) {
             $this->services->add('registry', new modRegistry($this));
             $this->registry = $this->services->get('registry');
 
+            $this->services->add(modManagerDateFormatter::class, fn() => new modManagerDateFormatter($this));
+
             if (!$this->getOption(xPDO::OPT_SETUP)) {
                 $this->invokeEvent(
                     'OnMODXInit',
@@ -2987,4 +2990,28 @@ public function _postProcess() {
         }
         $this->invokeEvent('OnWebPageComplete');
     }
+
+    /**
+     * Determine whether the passed value is a unix timestamp and, optionally, whether it is within
+     * a specified range
+     * @param string|int $value The timestamp to test
+     * @param bool $limitStart Optional minimum timestamp value that will validate
+     * @param bool $limitEnd Optional maximum timestamp value that will validate
+     * @return bool
+     */
+    public static function isValidTimestamp($value, $limitStart = false, $limitEnd = false): bool
+    {
+        // Check that value represents an integer (signed or unsigned)
+        if (!preg_match('/^-?[1-9][0-9]*$/', $value)) {
+            return false;
+        }
+        $value = (int)$value;
+        if (!($value <= PHP_INT_MAX && $value >= ~PHP_INT_MAX)) {
+            return false;
+        }
+        if (($limitStart !== false && $value < (int)$limitStart) || ($limitEnd !== false && $value > (int)$limitEnd)) {
+            return false;
+        }
+        return true;
+    }
 }
diff --git a/manager/assets/modext/sections/system/file/edit.js b/manager/assets/modext/sections/system/file/edit.js
index 80995229128..d5d994dfd43 100644
--- a/manager/assets/modext/sections/system/file/edit.js
+++ b/manager/assets/modext/sections/system/file/edit.js
@@ -111,14 +111,14 @@ MODx.panel.EditFile = function(config) {
                     ,name: 'last_accessed'
                     ,id: 'modx-file-last-accessed'
                     ,anchor: '100%'
-                    ,value: MODx.util.Format.dateFromTimestamp(config.record.last_accessed)
+                    ,value: config.record.last_accessed
                 },{
                     xtype: 'statictextfield'
                     ,fieldLabel: _('file_last_modified')
                     ,name: 'last_modified'
                     ,id: 'modx-file-last-modified'
                     ,anchor: '100%'
-                    ,value: MODx.util.Format.dateFromTimestamp(config.record.last_modified)
+                    ,value: config.record.last_modified
                 },{
                     xtype: 'textarea'
                     ,hideLabel: true
diff --git a/manager/assets/modext/widgets/media/modx.browser.js b/manager/assets/modext/widgets/media/modx.browser.js
index 67cb98113a0..4208711d9a8 100644
--- a/manager/assets/modext/widgets/media/modx.browser.js
+++ b/manager/assets/modext/widgets/media/modx.browser.js
@@ -43,7 +43,7 @@ MODx.browser.View = function(config) {
             {name: 'name', sortType: Ext.data.SortTypes.asUCString}
             ,'cls','url','relativeUrl','fullRelativeUrl','image','original_width','original_height','image_width','image_height','thumb','thumb_width','thumb_height','pathname','pathRelative','ext','disabled','preview'
             ,{name: 'size', type: 'float'}
-            ,{name: 'lastmod', type: 'date', dateFormat: 'timestamp'}
+            ,'lastmod'
             ,'menu', 'visibility'
         ]
         ,baseParams: {
@@ -393,7 +393,6 @@ Ext.extend(MODx.browser.View,MODx.DataView,{
         data.sizeString = data.size != 0 ? formatSize(data.size) : 0;
         data.imageSizeString = data.preview != 0 ? data.original_width + "x" + data.original_height + "px": 0;
         data.imageSizeString = data.imageSizeString === "xpx" ? 0 : data.imageSizeString;
-        data.dateString = !Ext.isEmpty(data.lastmod) ? new Date(data.lastmod).format(MODx.config.manager_date_format + " " + MODx.config.manager_time_format) : 0;
         this.lookup[data.name] = data;
         return data;
     }
@@ -460,9 +459,9 @@ Ext.extend(MODx.browser.View,MODx.DataView,{
             ,'      <b>'+_('image_size')+':</b>'
             ,'      <span>{imageSizeString}</span>'
             ,'  </tpl>'
-            ,'  <tpl if="dateString !== 0">'
+            ,'  <tpl if="lastmod !== 0">'
             ,'      <b>'+_('file_last_modified')+':</b>'
-            ,'      <span>{dateString}</span>'
+            ,'      <span>{lastmod}</span>'
             ,'  </tpl>'
             ,'  <tpl if="visibility">'
             ,'      <b>'+_('visibility')+':</b>'
diff --git a/manager/assets/modext/widgets/modx.panel.welcome.js b/manager/assets/modext/widgets/modx.panel.welcome.js
index 5210d3e4afc..56f0d81591b 100644
--- a/manager/assets/modext/widgets/modx.panel.welcome.js
+++ b/manager/assets/modext/widgets/modx.panel.welcome.js
@@ -91,10 +91,6 @@ Ext.extend(MODx.panel.Welcome, MODx.Panel, {
                             else if (response.message.length > 0) {
                                 container.innerHTML = '<p class="error">' + MODx.util.safeHtml(response.message) + '</p>';
                             }
-                            var datestamps = Ext.select(".date_stamp", container);
-                            datestamps.each(function (el) {
-                                el.dom.innerText = new Date(el.dom.innerText).format(MODx.config.manager_date_format + ' ' + MODx.config.manager_time_format);
-                            });
                         }, scope: this
                     }
                     ,failure: {
diff --git a/manager/assets/modext/widgets/resource/modx.panel.resource.data.js b/manager/assets/modext/widgets/resource/modx.panel.resource.data.js
index ea57402aace..e9889b13e64 100644
--- a/manager/assets/modext/widgets/resource/modx.panel.resource.data.js
+++ b/manager/assets/modext/widgets/resource/modx.panel.resource.data.js
@@ -2,8 +2,7 @@ MODx.panel.ResourceData = function(config) {
     config = config || {};
     var df = {
         border: false
-        ,msgTarget: 'side'
-        ,width: 300
+        ,anchor: '100%'
     };
     Ext.applyIf(config,{
         url: MODx.config.connector_url
@@ -27,119 +26,99 @@ MODx.panel.ResourceData = function(config) {
                 name: 'context_key'
                 ,fieldLabel: _('context')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'alias'
                 ,fieldLabel: _('resource_alias')
                 ,description: _('resource_alias_help')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'template_name'
                 ,fieldLabel: _('resource_template')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'pagetitle'
                 ,fieldLabel: _('resource_pagetitle')
                 ,description: _('resource_pagetitle_help')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'longtitle'
                 ,fieldLabel: _('resource_longtitle')
                 ,description: _('resource_longtitle_help')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
                 ,value: _('notset')
             },{
                 name: 'description'
                 ,fieldLabel: _('resource_description')
                 ,description: _('resource_description_help')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'introtext'
                 ,fieldLabel: _('resource_summary')
                 ,description: _('resource_summary_help')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'content'
                 ,fieldLabel: _('resource_content')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'published'
                 ,fieldLabel: _('resource_published')
                 ,description: _('resource_published_help')
                 ,xtype: 'staticboolean'
-                ,anchor: '100%'
             },{
                 name: 'deleted'
                 ,fieldLabel: _('deleted')
                 ,xtype: 'staticboolean'
-                ,anchor: '100%'
             },{
                 name: 'publishedon'
                 ,fieldLabel: _('resource_publishedon')
                 ,description: _('resource_publishedon_help')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'pub_date'
                 ,fieldLabel: _('resource_publishdate')
                 ,description: _('resource_publishdate_help')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'unpub_date'
                 ,fieldLabel: _('resource_unpublishdate')
                 ,description: _('resource_unpublishdate_help')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'hidemenu'
                 ,fieldLabel: _('resource_hide_from_menus')
                 ,description: _('resource_hide_from_menus_help')
                 ,xtype: 'staticboolean'
-                ,anchor: '100%'
             },{
                 name: 'menutitle'
                 ,fieldLabel: _('resource_menutitle')
                 ,description: _('resource_menutitle_help')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'menuindex'
                 ,fieldLabel: _('resource_menuindex')
                 ,description: _('resource_menuindex_help')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'link_attributes'
                 ,fieldLabel: _('resource_link_attributes')
                 ,description: _('resource_link_attributes_help')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'class_key'
                 ,fieldLabel: _('class_key')
                 ,description: _('resource_class_key_help')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'content_type'
                 ,fieldLabel: _('resource_content_type')
                 ,description: _('resource_content_type_help')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'isfolder'
                 ,fieldLabel: _('resource_folder')
                 ,description: _('resource_folder_help')
                 ,xtype: 'staticboolean'
-                ,anchor: '100%'
             },{
                 name: 'show_in_tree'
                 ,fieldLabel: _('resource_show_in_tree')
@@ -163,7 +142,6 @@ MODx.panel.ResourceData = function(config) {
                 ,fieldLabel: _('resource_uri_override')
                 ,description: _('resource_uri_override_help')
                 ,xtype: 'staticboolean'
-                ,anchor: '100%'
             },{
                 name: 'uri'
                 ,fieldLabel: _('resource_uri')
@@ -175,31 +153,26 @@ MODx.panel.ResourceData = function(config) {
                 ,fieldLabel: _('resource_parent')
                 ,description: _('resource_parent_help')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'content_dispo'
                 ,fieldLabel: _('resource_contentdispo')
                 ,description: _('resource_contentdispo_help')
                 ,xtype: 'statictextfield'
-                ,anchor: '100%'
             },{
                 name: 'richtext'
                 ,fieldLabel: _('resource_richtext')
                 ,description: _('resource_richtext_help')
                 ,xtype: 'staticboolean'
-                ,anchor: '100%'
             },{
                 name: 'searchable'
                 ,fieldLabel: _('resource_searchable')
                 ,description: _('resource_searchable_help')
                 ,xtype: 'staticboolean'
-                ,anchor: '100%'
             },{
                 name: 'cacheable'
                 ,fieldLabel: _('resource_cacheable')
                 ,description: _('resource_cacheable_help')
                 ,xtype: 'staticboolean'
-                ,anchor: '100%'
             }]
         },{
             title: _('changes')
@@ -213,7 +186,6 @@ MODx.panel.ResourceData = function(config) {
             ,items: [{
                 name: 'createdon_adjusted'
                 ,fieldLabel: _('resource_createdon')
-                ,anchor: '100%'
             },{
                 name: 'createdon_by'
                 ,fieldLabel: _('resource_createdby')
@@ -221,22 +193,17 @@ MODx.panel.ResourceData = function(config) {
             },{
                 name: 'publishedon_adjusted'
                 ,fieldLabel: _('resource_publishedon')
-                ,anchor: '100%'
             },{
                 name: 'publishedon_by'
                 ,fieldLabel: _('resource_publishedby')
-                ,anchor: '100%'
             },{
                 name: 'editedon_adjusted'
                 ,fieldLabel: _('resource_editedon')
-                ,anchor: '100%'
             },{
                 name: 'editedon_by'
                 ,fieldLabel: _('resource_editedby')
-                ,anchor: '100%'
             },{
                 xtype: 'modx-grid-manager-log'
-                ,anchor: '100%'
                 ,preventRender: true
                 ,formpanel: 'modx-panel-manager-log'
                 ,baseParams: {
@@ -297,8 +264,7 @@ Ext.extend(MODx.panel.ResourceData,MODx.FormPanel,{
             }
             ,listeners: {
                 'success': {fn:function(r) {
-                    if (r.object.pub_date == '0') { r.object.pub_date = ''; }
-                    if (r.object.unpub_date == '0') { r.object.unpub_date = ''; }
+                    r.object.publishedon = r.object.publishedon_adjusted;
                     Ext.get('modx-resource-header').update(Ext.util.Format.htmlEncode(r.object.pagetitle));
                     this.getForm().setValues(r.object);
                     this.fireEvent('ready');
diff --git a/manager/assets/modext/widgets/resource/modx.panel.resource.schedule.js b/manager/assets/modext/widgets/resource/modx.panel.resource.schedule.js
index 13fc9227bf5..4be9016330f 100644
--- a/manager/assets/modext/widgets/resource/modx.panel.resource.schedule.js
+++ b/manager/assets/modext/widgets/resource/modx.panel.resource.schedule.js
@@ -57,7 +57,7 @@ MODx.grid.ResourceSchedule = function(config) {
             ,'pagetitle'
             ,'class_key'
             ,{name: 'pub_date', type: 'date'}
-            ,{name: 'unpub_date', type:'date'}
+            ,{name: 'unpub_date', type: 'date'}
             ,'menu'
         ]
         ,showActionsColumn: false
@@ -88,7 +88,7 @@ MODx.grid.ResourceSchedule = function(config) {
                 ,timeFormat: MODx.config.manager_time_format
                 ,ctCls: 'x-datetime-inline-editor'
             }
-            ,renderer: Ext.util.Format.dateRenderer(MODx.config.manager_date_format + ' ' + MODx.config.manager_time_format)
+            ,renderer: Ext.util.Format.dateRenderer(MODx.config.manager_date_format + MODx.config.manager_datetime_separator + MODx.config.manager_time_format)
         },{
             header: _('unpublish_date')
             ,dataIndex: 'unpub_date'
@@ -99,7 +99,7 @@ MODx.grid.ResourceSchedule = function(config) {
                 ,timeFormat: MODx.config.manager_time_format
                 ,ctCls: 'x-datetime-inline-editor'
             }
-            ,renderer: Ext.util.Format.dateRenderer(MODx.config.manager_date_format + ' ' + MODx.config.manager_time_format)
+            ,renderer: Ext.util.Format.dateRenderer(MODx.config.manager_date_format + MODx.config.manager_datetime_separator + MODx.config.manager_time_format)
         }]
         ,tbar: [{
             text: _('showing_pub')
@@ -108,7 +108,7 @@ MODx.grid.ResourceSchedule = function(config) {
             ,enableToggle: true
             ,tooltip: _('click_to_change')
             ,id: 'btn-toggle'
-            ,cls:'primary-button'
+            ,cls: 'primary-button'
         }]
     });
     MODx.grid.ResourceSchedule.superclass.constructor.call(this,config);
diff --git a/manager/assets/modext/widgets/security/modx.grid.user.recent.resource.js b/manager/assets/modext/widgets/security/modx.grid.user.recent.resource.js
index cb749b53652..a64f3929cde 100644
--- a/manager/assets/modext/widgets/security/modx.grid.user.recent.resource.js
+++ b/manager/assets/modext/widgets/security/modx.grid.user.recent.resource.js
@@ -37,7 +37,6 @@ MODx.grid.RecentlyEditedResourcesByUser = function(config) {
         },{
             header: _('editedon')
             ,dataIndex: 'occurred'
-            ,renderer : Ext.util.Format.dateRenderer(dateFormat)
         },{
             header: _('published')
             ,dataIndex: 'published'
diff --git a/manager/assets/modext/widgets/system/modx.grid.manager.log.js b/manager/assets/modext/widgets/system/modx.grid.manager.log.js
index 8a0b549defd..82088d5cb05 100644
--- a/manager/assets/modext/widgets/system/modx.grid.manager.log.js
+++ b/manager/assets/modext/widgets/system/modx.grid.manager.log.js
@@ -75,6 +75,7 @@ MODx.panel.ManagerLog = function(config) {
                             ,name: 'dateStart'
                             ,allowBlank: true
                             ,anchor: '100%'
+                            ,format: MODx.config.manager_date_format
                             ,listeners: {
                                 'select': {fn: this.filter, scope: this}
                                 ,'render': {fn:this._addEnterKeyHandler}
@@ -85,6 +86,7 @@ MODx.panel.ManagerLog = function(config) {
                             ,name: 'dateEnd'
                             ,allowBlank: true
                             ,anchor: '100%'
+                            ,format: MODx.config.manager_date_format
                             ,listeners: {
                                 'select': {fn: this.filter, scope: this}
                                 ,'render': {fn:this._addEnterKeyHandler}
diff --git a/manager/assets/modext/workspace/lexicon/lexicon.grid.js b/manager/assets/modext/workspace/lexicon/lexicon.grid.js
index 7d7d5440d10..6b074fa3c78 100644
--- a/manager/assets/modext/workspace/lexicon/lexicon.grid.js
+++ b/manager/assets/modext/workspace/lexicon/lexicon.grid.js
@@ -49,7 +49,6 @@ MODx.grid.Lexicon = function(config = {}) {
             header: _('last_modified')
             ,dataIndex: 'editedon'
             ,width: 125
-            ,renderer: this._renderLastModDate
         }]
         ,tbar: {
             cls: 'has-nested-filters',
@@ -236,12 +235,12 @@ Ext.extend(MODx.grid.Lexicon,MODx.grid.Grid,{
         }
     }
 
+    /**
+     * @deprecated since 3.0.5. To be removed in future release. Datetime formatting
+     * now handled in back end processors to provide uniform display across components.
+     */
     ,_renderLastModDate: function(value) {
-        if (Ext.isEmpty(value)) {
-            return '—';
-        }
-
-        return new Date(value*1000).format(MODx.config.manager_date_format + ' ' + MODx.config.manager_time_format);
+        return value;
     }
 
     ,loadWindow2: function(btn,e,o) {
diff --git a/manager/assets/modext/workspace/package.grid.js b/manager/assets/modext/workspace/package.grid.js
index c25d19b2098..3914fb4080b 100644
--- a/manager/assets/modext/workspace/package.grid.js
+++ b/manager/assets/modext/workspace/package.grid.js
@@ -211,16 +211,11 @@ Ext.extend(MODx.grid.Package,MODx.grid.Grid,{
         return this.mainColumnTpl.apply(values);
     }
 
-    ,dateColumnRenderer: function(d,c) {
-        switch(d) {
-            case '':
-            case null:
-                c.css = 'not-installed';
-                return _('not_installed');
-            default:
-                c.css = '';
-                return _('installed_on',{'time':d});
+    ,dateColumnRenderer: function(value, metaData) {
+        if (Ext.isEmpty(value) || value.includes(_('not_installed'))) {
+            metaData.css = 'not-installed';
         }
+        return value;
     }
 
     ,onClick: function(e){
diff --git a/manager/assets/modext/workspace/package/package.versions.grid.js b/manager/assets/modext/workspace/package/package.versions.grid.js
index 0223981dd67..eac7118d076 100644
--- a/manager/assets/modext/workspace/package/package.versions.grid.js
+++ b/manager/assets/modext/workspace/package/package.versions.grid.js
@@ -41,16 +41,11 @@ MODx.grid.PackageVersions = function(config) {
 };
 Ext.extend(MODx.grid.PackageVersions,MODx.grid.Grid,{
 
-    _rins: function(d,c) {
-        switch(d) {
-            case '':
-            case null:
-                c.css = 'not-installed';
-                return _('not_installed');
-            default:
-                c.css = '';
-                return d;
+    _rins: function(value, metaData) {
+        if (Ext.isEmpty(value) || value.includes(_('not_installed'))) {
+            metaData.css = 'not-installed';
         }
+        return value;
     }
 
     ,removePriorVersion: function(btn,e) {
diff --git a/manager/controllers/default/resource/data.class.php b/manager/controllers/default/resource/data.class.php
index 39614ebfb4b..887fb1965c2 100644
--- a/manager/controllers/default/resource/data.class.php
+++ b/manager/controllers/default/resource/data.class.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of MODX Revolution.
  *
@@ -102,7 +103,7 @@ public function process(array $scriptProperties = [])
         $buffer = $this->modx->cacheManager->get($this->resource->getCacheKey(), [
             xPDO::OPT_CACHE_KEY => $this->modx->getOption('cache_resource_key', null, 'resource'),
             xPDO::OPT_CACHE_HANDLER => $this->modx->getOption('cache_resource_handler', null, $this->modx->getOption(xPDO::OPT_CACHE_HANDLER)),
-            xPDO::OPT_CACHE_FORMAT => (integer)$this->modx->getOption('cache_resource_format', null, $this->modx->getOption(xPDO::OPT_CACHE_FORMAT, null, xPDOCacheManager::CACHE_PHP)),
+            xPDO::OPT_CACHE_FORMAT => (int)$this->modx->getOption('cache_resource_format', null, $this->modx->getOption(xPDO::OPT_CACHE_FORMAT, null, xPDOCacheManager::CACHE_PHP)),
         ]);
         if ($buffer) {
             $placeholders['buffer'] = htmlspecialchars($buffer['resource']['_content']);
@@ -115,9 +116,9 @@ public function process(array $scriptProperties = [])
         $placeholders['_ctx'] = $this->resource->get('context_key');
 
         return $placeholders;
+        return '';
     }
 
-
     /**
      * @return string
      */
@@ -160,7 +161,7 @@ public function getTemplateFile()
      */
     public function getLanguageTopics()
     {
-        return ['resource'];
+        return ['resource', 'manager_log'];
     }
 
 
diff --git a/manager/controllers/default/system/file/edit.class.php b/manager/controllers/default/system/file/edit.class.php
index 42ce2e85543..60de7d64891 100644
--- a/manager/controllers/default/system/file/edit.class.php
+++ b/manager/controllers/default/system/file/edit.class.php
@@ -1,4 +1,5 @@
 <?php
+
 /*
  * This file is part of MODX Revolution.
  *
@@ -8,6 +9,7 @@
  * files found in the top-level directory of this distribution.
  */
 
+use MODX\Revolution\Formatter\modManagerDateFormatter;
 use MODX\Revolution\modManagerController;
 use MODX\Revolution\modSystemEvent;
 use MODX\Revolution\Sources\modFileMediaSource;
@@ -104,6 +106,14 @@ public function process(array $scriptProperties = [])
 
             return false;
         }
+        /** @var modManagerDateFormatter $formatter */
+        $formatter = $this->modx->services->get(modManagerDateFormatter::class);
+        if (!empty($this->fileRecord['last_accessed'])) {
+            $this->fileRecord['last_accessed'] = $formatter->formatDateTime($this->fileRecord['last_accessed']);
+        }
+        if (!empty($this->fileRecord['last_modified'])) {
+            $this->fileRecord['last_modified'] = $formatter->formatDateTime($this->fileRecord['last_modified']);
+        }
         $this->canSave = true;
 
         $placeholders['fa'] = $this->fileRecord;
diff --git a/manager/templates/default/dashboard/onlineusers.tpl b/manager/templates/default/dashboard/onlineusers.tpl
index 3831a516074..1fba0446044 100644
--- a/manager/templates/default/dashboard/onlineusers.tpl
+++ b/manager/templates/default/dashboard/onlineusers.tpl
@@ -28,8 +28,8 @@
                         </div>
                     </td>
                     <td class="occurred">
-                        <div class="occurred-date">{$record.occurred|date_format:'%B %d, %Y'}</div>
-                        <div class="occurred-time">{$record.occurred|date_format:'%H:%M'}</div>
+                        <div class="occurred-date">{$record.occurred_date}</div>
+                        <div class="occurred-time">{$record.occurred_time}</div>
                     </td>
                     <td>{$record.action}</td>
                 </tr>