diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8dcd46132..9bdd0c984 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,6 +31,11 @@ Each month below should look like the following, using the same ordering for the
 - Added full Unicode support to IMS. All text fields now accept previously unsupported characters, like those from Cyrillic, Chinese, emoji, and much more ([#1353](https://github.com/burningmantech/ranger-ims-server/issues/1353))
 - Started doing client-side retries on any EventSource connection failures. This should mean that an IMS web session will be better kept in sync with incident updates, in particular in the off-season, when IMS is running on AWS ([#1389](https://github.com/burningmantech/ranger-ims-server/pull/1389))
 - Added a warning banner to non-production instances of the web UI, to make sure people don't accidentally put prod data into non-production IMS instances. [(#1366](https://github.com/burningmantech/ranger-ims-server/issues/1366))
+- Started showing full datetimes, including time zone, when a user hovers over a time on the incidents page. All times have always been in the user's locale, but this wasn't indicated anywhere ([#1412](https://github.com/burningmantech/ranger-ims-server/pull/1412)
+
+### Removed
+
+- Got rid of Moment.js dependency, as it's deprecated and we're able to use the newer Intl JavaScript browser construct instead ([#1412](https://github.com/burningmantech/ranger-ims-server/pull/1412)
 
 ### Fixed
 
diff --git a/src/ims/application/_external.py b/src/ims/application/_external.py
index 6368fc014..fd59f242c 100644
--- a/src/ims/application/_external.py
+++ b/src/ims/application/_external.py
@@ -683,13 +683,11 @@ class ExternalApplication:
     bootstrapVersionNumber = "3.3.7"
     jqueryVersionNumber = "3.1.0"
     dataTablesVersionNumber = "1.10.12"
-    momentVersionNumber = "2.22.2"
     lscacheVersionNumber = "1.0.5"
 
     bootstrapVersion = f"bootstrap-{bootstrapVersionNumber}-dist"
     jqueryVersion = f"jquery-{jqueryVersionNumber}"
     dataTablesVersion = f"DataTables-{dataTablesVersionNumber}"
-    momentVersion = f"moment-{momentVersionNumber}"
     lscacheVersion = f"lscache-{lscacheVersionNumber}"
 
     bootstrapSourceURL = URL.fromText(
@@ -712,11 +710,6 @@ class ExternalApplication:
         f"DataTables-{dataTablesVersionNumber}.zip"
     )
 
-    momentJSSourceURL = URL.fromText(
-        f"https://cdnjs.cloudflare.com/ajax/libs/moment.js/"
-        f"{momentVersionNumber}/moment.min.js"
-    )
-
     lscacheJSSourceURL = URL.fromText(
         f"https://raw.githubusercontent.com/pamelafox/lscache/"
         f"{lscacheVersionNumber}/lscache.min.js"
@@ -802,19 +795,6 @@ async def dataTablesResource(self, request: IRequest) -> KleinRenderable:
             *names,
         )
 
-    @router.route(_unprefix(URLs.momentJS), methods=("HEAD", "GET"))
-    @static
-    async def momentJSResource(self, request: IRequest) -> KleinRenderable:
-        """
-        Endpoint for moment.js.
-        """
-        request.setHeader(
-            HeaderName.contentType.value, ContentType.javascript.value
-        )
-        return await self.cachedResource(
-            request, self.momentJSSourceURL, f"{self.momentVersion}.min.js"
-        )
-
     @router.route(_unprefix(URLs.lscacheJS), methods=("HEAD", "GET"))
     @static
     async def lscacheJSResource(self, request: IRequest) -> KleinRenderable:
diff --git a/src/ims/config/_urls.py b/src/ims/config/_urls.py
index 0f6a243ef..5d95f03bb 100644
--- a/src/ims/config/_urls.py
+++ b/src/ims/config/_urls.py
@@ -97,8 +97,6 @@ class URLs:
         "media", "js", "dataTables.bootstrap.min.js"
     )
 
-    momentJS: ClassVar[URL] = external.child("moment.min.js")
-
     lscacheJS: ClassVar[URL] = external.child("lscache.min.js")
 
     # Web application
diff --git a/src/ims/element/page/_page.py b/src/ims/element/page/_page.py
index 169214785..f41b1f311 100644
--- a/src/ims/element/page/_page.py
+++ b/src/ims/element/page/_page.py
@@ -66,7 +66,6 @@ def add(name: str) -> None:
 
             if name == "ims":
                 add("jquery")
-                add("moment")
 
             try:
                 result[name] = getattr(urls, f"{name}JS")
diff --git a/src/ims/element/static/ims.js b/src/ims/element/static/ims.js
index b4f9b8ea6..6c69ef567 100644
--- a/src/ims/element/static/ims.js
+++ b/src/ims/element/static/ims.js
@@ -188,11 +188,10 @@ function parseInt(stringInt) {
 
 // Create a <time> element from a date.
 function timeElement(date) {
-    date = moment(date);
     var timeStampContainer = jQuery(
         "<time />", {"datetime": date.toISOString()}
     );
-    timeStampContainer.text(date.format("MMMM Do YYYY HH:mm:ss"));
+    timeStampContainer.text(fullDateTime.format(date));
     return timeStampContainer;
 }
 
@@ -603,15 +602,45 @@ function renderPriority(priorityNumber, type, incident) {
     return undefined;
 }
 
+// e.g. "Wed, 8/28"
+const shortDate = new Intl.DateTimeFormat(undefined, {
+    weekday: "short",
+    month: "numeric",
+    day: "2-digit",
+    // timeZone not specified; will use user's timezone
+});
+
+// e.g. "19:21"
+const shortTime = new Intl.DateTimeFormat(undefined, {
+    hour: "numeric",
+    hour12: false,
+    minute: "numeric",
+    // timeZone not specified; will use user's timezone
+});
+
+// e.g. "Oct 8, 2023, 19:11:04 EDT"
+const fullDateTime = new Intl.DateTimeFormat(undefined, {
+    year: "numeric",
+    month: "short",
+    day: "numeric",
+    hour: "numeric",
+    hour12: false,
+    minute: "numeric",
+    second: "numeric",
+    timeZoneName: "short",
+    // timeZone not specified; will use user's timezone
+});
+
 function renderDate(date, type, incident) {
+    const d = Date.parse(date);
     switch (type) {
         case "display":
-            return moment(date).format("dd M/D[<wbr />]@HH:mm");
+            return shortDate.format(d) + "<wbr />@" + shortTime.format(d);
         case "filter":
-            return moment(date).format("dd M/D HH:mm");
+            return shortDate.format(d) + " " + shortTime.format(d);
         case "type":
         case "sort":
-            return moment(date);
+            return d;
     }
     return undefined;
 }
diff --git a/src/ims/element/static/incident_reports.js b/src/ims/element/static/incident_reports.js
index f9b753104..40d3ca682 100644
--- a/src/ims/element/static/incident_reports.js
+++ b/src/ims/element/static/incident_reports.js
@@ -178,6 +178,8 @@ function initDataTables() {
                 // Open new context with link
                 window.open(url, "Incident_Report:" + incidentReport.number);
             });
+            $(row).find(".incident_report_created")
+                .attr("title", fullDateTime.format(Date.parse(incidentReport.created)));
         },
     });
 }
@@ -229,12 +231,13 @@ function initSearchField() {
 
 function initSearch() {
     function modifiedAfter(incidentReport, timestamp) {
-        if (timestamp.isBefore(incidentReport.created)) {
+        if (timestamp < Date.parse(incidentReport.created)) {
             return true;
         }
 
+        // needs to use native comparison
       for (var i in incidentReport.report_entries) {
-          if (timestamp.isBefore(incidentReport.report_entries[i].created)) {
+          if (timestamp < Date.parse(incidentReport.report_entries[i].created)) {
               return true;
           }
       }
@@ -280,10 +283,12 @@ function showDays(daysBackToShow) {
     if (daysBackToShow == null) {
         _showModifiedAfter = null;
     } else {
-        _showModifiedAfter = moment()
-            .startOf("day")
-            .subtract(daysBackToShow, "days")
-            ;
+        const after = new Date();
+        after.setHours(0);
+        after.setMinutes(0);
+        after.setSeconds(0);
+        after.setDate(after.getDate()-daysBackToShow);
+        _showModifiedAfter = after;
     }
 
     incidentReportsTable.draw();
diff --git a/src/ims/element/static/incidents.js b/src/ims/element/static/incidents.js
index 91efb7047..17614fc88 100644
--- a/src/ims/element/static/incidents.js
+++ b/src/ims/element/static/incidents.js
@@ -250,6 +250,8 @@ function initDataTables() {
                     url, "Incident:" + eventID + "#" + incident.number
                 );
             });
+            $(row).find(".incident_created")
+                .attr("title", fullDateTime.format(Date.parse(incident.created)));
         },
     });
 }
@@ -315,12 +317,12 @@ function initSearchField() {
 
 function initSearch() {
     function modifiedAfter(incident, timestamp) {
-        if (timestamp.isBefore(incident.created)) {
+        if (timestamp < Date.parse(incident.created)) {
             return true;
         }
 
         for (var i in incident.report_entries) {
-            if (timestamp.isBefore(incident.report_entries[i].created)) {
+            if (timestamp < Date.parse(incident.report_entries[i].created)) {
                 return true;
             }
         }
@@ -420,10 +422,12 @@ function showDays(daysBackToShow) {
     if (daysBackToShow == null) {
         _showModifiedAfter = null;
     } else {
-        _showModifiedAfter = moment()
-            .startOf("day")
-            .subtract(daysBackToShow, "days")
-            ;
+        const after = new Date();
+        after.setHours(0);
+        after.setMinutes(0);
+        after.setSeconds(0);
+        after.setDate(after.getDate()-daysBackToShow);
+        _showModifiedAfter = after;
     }
 
     incidentsTable.draw();