diff --git a/src/dev/impl/DevToys.MonacoEditor/CodeEditorControl/CodeEditorCore.cs b/src/dev/impl/DevToys.MonacoEditor/CodeEditorControl/CodeEditorCore.cs
index 56814bab33..a1e42d87a0 100644
--- a/src/dev/impl/DevToys.MonacoEditor/CodeEditorControl/CodeEditorCore.cs
+++ b/src/dev/impl/DevToys.MonacoEditor/CodeEditorControl/CodeEditorCore.cs
@@ -1069,6 +1069,11 @@ public IAsyncAction SetPositionAsync(IPosition position)
             return SendScriptAsync("editor.setPosition(" + JsonConvert.SerializeObject(position) + ");").AsAsyncAction();
         }
 
+        public void RegisterDateHoverProvider()
+        {
+            _ = InvokeScriptAsync("registerDateHoverProvider", "json");
+        }
+
         /// <summary>
         /// https://microsoft.github.io/monaco-editor/api/interfaces/monaco.editor.icommoncodeeditor.html#deltadecorations
         /// 
diff --git a/src/dev/impl/DevToys.MonacoEditor/ts-helpermethods/otherScriptsToBeOrganized.ts b/src/dev/impl/DevToys.MonacoEditor/ts-helpermethods/otherScriptsToBeOrganized.ts
index 2677c50435..d4c5d4faa3 100644
--- a/src/dev/impl/DevToys.MonacoEditor/ts-helpermethods/otherScriptsToBeOrganized.ts
+++ b/src/dev/impl/DevToys.MonacoEditor/ts-helpermethods/otherScriptsToBeOrganized.ts
@@ -20,6 +20,32 @@ var registerHoverProvider = function (languageId: string) {
     });
 }
 
+var registerDateHoverProvider = function (languageId: string) {
+    return monaco.languages.registerHoverProvider(languageId, {
+        provideHover: function (model, position) {
+            var wordAtPosition = model.getWordAtPosition(position);
+            if (wordAtPosition === null) {
+                return null;
+            }
+            var date = new Date(Number(wordAtPosition.word) * 1000);
+            if (isNaN(date.getTime())) {
+                return null;
+            }
+            return {
+                range: new monaco.Range(
+                    position.lineNumber,
+                    wordAtPosition.startColumn,
+                    position.lineNumber,
+                    wordAtPosition.endColumn
+                ),
+                contents: [
+                    { value: date.toString() },
+                ],
+            };
+        }
+    });
+}
+
 var addAction = function (action: monaco.editor.IActionDescriptor) {
     action.run = function (ed) {
         Parent.callAction("Action" + action.id)
diff --git a/src/dev/impl/DevToys/UI/Controls/CodeEditor.xaml.cs b/src/dev/impl/DevToys/UI/Controls/CodeEditor.xaml.cs
index 66418f10b5..e5d96f0b8f 100644
--- a/src/dev/impl/DevToys/UI/Controls/CodeEditor.xaml.cs
+++ b/src/dev/impl/DevToys/UI/Controls/CodeEditor.xaml.cs
@@ -189,6 +189,19 @@ public bool InlineDiffViewMode
             set => SetValue(InlineDiffViewModeProperty, value);
         }
 
+        public static readonly DependencyProperty ShowDatesHoverProperty
+            = DependencyProperty.Register(
+                nameof(ShowDatesHover),
+                typeof(bool),
+                typeof(CodeEditor),
+                new PropertyMetadata(false));
+
+        public bool ShowDatesHover
+        {
+            get => (bool)GetValue(ShowDatesHoverProperty);
+            set => SetValue(ShowDatesHoverProperty, value);
+        }
+
         public CodeEditor()
         {
             SettingsProvider = MefComposer.Provider.Import<ISettingsProvider>();
@@ -251,9 +264,14 @@ private void CodeEditorCore_Loading(object sender, RoutedEventArgs e)
                 };
                 _codeEditorCore.Options.Hover = new EditorHoverOptions()
                 {
-                    Enabled = false
+                    Enabled = ShowDatesHover
                 };
 
+                if (ShowDatesHover)
+                {
+                    _codeEditorCore.RegisterDateHoverProvider();
+                }
+
                 _codeEditorCore.DiffOptions.GlyphMargin = false;
                 _codeEditorCore.DiffOptions.MouseWheelZoom = false;
                 _codeEditorCore.DiffOptions.OverviewRulerBorder = false;
diff --git a/src/dev/impl/DevToys/Views/Tools/EncodersDecoders/JwtDecoderEncoder/JwtDecoderControl.xaml b/src/dev/impl/DevToys/Views/Tools/EncodersDecoders/JwtDecoderEncoder/JwtDecoderControl.xaml
index bd5eb23520..807a15bd2e 100644
--- a/src/dev/impl/DevToys/Views/Tools/EncodersDecoders/JwtDecoderEncoder/JwtDecoderControl.xaml
+++ b/src/dev/impl/DevToys/Views/Tools/EncodersDecoders/JwtDecoderEncoder/JwtDecoderControl.xaml
@@ -175,6 +175,7 @@
             Header="{x:Bind ViewModel.LocalizedStrings.JwtPayloadLabel}"
             Text="{x:Bind ViewModel.Payload, Mode=OneWay}"
             CodeLanguage="json"
+            ShowDatesHover="True"
             IsReadOnly="True"/>
         <Grid
             x:Name="SignatureGrid"