diff --git a/src/main/java/sqltoregex/controller/SqlToRegexController.java b/src/main/java/sqltoregex/controller/SqlToRegexController.java
index 2b8aeffb..bb81b49a 100644
--- a/src/main/java/sqltoregex/controller/SqlToRegexController.java
+++ b/src/main/java/sqltoregex/controller/SqlToRegexController.java
@@ -83,9 +83,29 @@ private SettingsForm addSettingsFormFields(Model model) {
         })));
         model.addAttribute("timeFormats",
                            getSynonymSetOf(DateAndTimeFormatSynonymGenerator.class, SettingsOption.TIMESYNONYMS,
-                                           SettingsType.ALL));
+                                           SettingsType.ALL).stream().collect(Collectors.groupingBy(el -> {
+                               String patternString = el.toPattern();
+                               Pattern pattern = Pattern.compile("[^a-zA-Z]");
+                               Matcher matcher = pattern.matcher(patternString);
+
+                               if (matcher.find()) {
+                                   return patternString.charAt(matcher.start());
+                               } else {
+                                   return " ";
+                               }
+                           })));
         model.addAttribute("dateTimeFormats", getSynonymSetOf(DateAndTimeFormatSynonymGenerator.class,
-                                                              SettingsOption.DATETIMESYNONYMS, SettingsType.ALL));
+                                                              SettingsOption.DATETIMESYNONYMS, SettingsType.ALL).stream().collect(Collectors.groupingBy(el -> {
+            String patternString = el.toPattern();
+            Pattern pattern = Pattern.compile("[^a-zA-Z]");
+            Matcher matcher = pattern.matcher(patternString);
+
+            if (matcher.find()) {
+                return patternString.charAt(matcher.start());
+            } else {
+                return " ";
+            }
+        })));
         //special preprocessing to render comfortably on frontend
         Map<String, Set<String>> aggregateFunctionSynonymsMap = settingsManager.getSettingBySettingsOption(
                         SettingsOption.AGGREGATEFUNCTIONLANG, StringSynonymGenerator.class, SettingsType.ALL)
diff --git a/src/main/resources/static/config/properties.xml b/src/main/resources/static/config/properties.xml
index f22e592e..57bf9eb6 100644
--- a/src/main/resources/static/config/properties.xml
+++ b/src/main/resources/static/config/properties.xml
@@ -71,6 +71,7 @@
           <value>yy/M/d</value>
           <value>yy|M|d</value>
           <value>yyyyMMdd</value>
+          <value>yyMMdd</value>
       </datesynonyms>
       <timesynonyms>
           <settingstype>ALL;DEFAULT_SCHOOL</settingstype>
@@ -81,6 +82,7 @@
           <value>H:m:s</value>
           <value>H/m/s</value>
           <value>H|m|s</value>
+          <value>H-m-s</value>
           <value>HH:mm</value>
           <value>HH/mm</value>
           <value>HH|mm</value>
@@ -88,9 +90,11 @@
           <value>H:m</value>
           <value>H/m</value>
           <value>H|m</value>
+          <value>H-m</value>
       </timesynonyms>
       <datetimesynonyms>
           <settingstype>ALL;DEFAULT_SCHOOL</settingstype>
+          <value>yyyyMMddhhmmss</value>
           <value>yyyy-MM-dd hh:mm:ss</value>
           <value>yyyy.MM.dd hh:mm:ss</value>
           <value>yyyy|MM|dd hh|mm|ss</value>
diff --git a/src/main/resources/templates/assets/settingsform/form.html b/src/main/resources/templates/assets/settingsform/form.html
index eda9e9f4..17658d9d 100644
--- a/src/main/resources/templates/assets/settingsform/form.html
+++ b/src/main/resources/templates/assets/settingsform/form.html
@@ -86,21 +86,21 @@
                     </div>
 
                     <hr>
-                    <div class="row">
+                    <div class="row" th:each="timeFormatsEntry : ${timeFormats}">
                         <div class="col-sm"
-                             th:each="setting : ${timeFormats}">
+                             th:each="setting : ${timeFormatsEntry.getValue()}">
                             <div class="form-check form-switch">
-                                <input class="form-check-input" type="checkbox" onchange="updateSingleUserSetting(this, document.getElementById('converterForm'))" th:id="'dateAndTime_' + ${setting.toPattern()}" th:value="${setting.toPattern()}" th:name="timeFormats" th:checked="${settingsForm.timeFormats.contains(setting)}">
+                                <input class="form-check-input" type="checkbox" onchange="updateSingleUserSetting(this, document.getElementById('converterForm'))" th:id="'dateAndTime_' + ${setting.toPattern()}" th:value="${setting.toPattern()}" th:name="timeFormats" th:checked="${#sets.contains(settingsForm.getTimeFormats(), setting)}">
                                 <label class="form-check-label" style="min-width: 100px" th:for="'timeFormats_' + ${setting.toPattern()}" th:text="${setting.toPattern()}">Enable format: "hh:MM:ss"</label>
                             </div>
                         </div>
                     </div>
                     <hr>
-                    <div class="row">
+                    <div class="row" th:each="dateTimeFormatsEntry : ${dateTimeFormats}">
                         <div class="col-sm"
-                             th:each="setting : ${dateTimeFormats}">
+                             th:each="setting : ${dateTimeFormatsEntry.getValue()}">
                             <div class="form-check form-switch">
-                                <input class="form-check-input" type="checkbox" onchange="updateSingleUserSetting(this, document.getElementById('converterForm'))" th:id="'dateAndTime_' + ${setting.toPattern()}" th:value="${setting.toPattern()}" th:name="dateTimeFormats" th:checked="${settingsForm.dateTimeFormats.contains(setting)}">
+                                <input class="form-check-input" type="checkbox" onchange="updateSingleUserSetting(this, document.getElementById('converterForm'))" th:id="'dateAndTime_' + ${setting.toPattern()}" th:value="${setting.toPattern()}" th:name="dateTimeFormats" th:checked="${#sets.contains(settingsForm.getDateTimeFormats(), setting)}">
                                 <label class="form-check-label" style="min-width: 200px" th:for="'dateTimeFormats_' + ${setting.toPattern()}" th:text="${setting.toPattern()}">Enable format: "yyyy-MM-dd"</label>
                             </div>
                         </div>