diff --git a/src/activities/Elsa.Activities.Temporal.Common/Activities/ClearTimer/CancelTimer.cs b/src/activities/Elsa.Activities.Temporal.Common/Activities/ClearTimer/CancelTimer.cs
index 2043f0343..a4cf0d08d 100644
--- a/src/activities/Elsa.Activities.Temporal.Common/Activities/ClearTimer/CancelTimer.cs
+++ b/src/activities/Elsa.Activities.Temporal.Common/Activities/ClearTimer/CancelTimer.cs
@@ -2,14 +2,14 @@ using System.Threading.Tasks;
 using Elsa.Activities.Temporal.Common.Services;
 using Elsa.ActivityResults;
 using Elsa.Attributes;
+using Elsa.Expressions;
 using Elsa.Services;
 using Elsa.Services.Models;
 
 // ReSharper disable once CheckNamespace
 namespace Elsa.Activities.Temporal
 {
-
-    [Trigger(Category = "Timers", Description = "Cancel a timer (Cron, StartAt, Timer) so that it is not executed. ")]
+    [Trigger(Category = "Timers", Description = "Cancel a timer (Cron, StartAt, Timer) so that it is not executed.")]
     public class ClearTimer : Activity
     {
         private readonly IWorkflowScheduler _workflowScheduler;
@@ -19,7 +19,7 @@ namespace Elsa.Activities.Temporal
             _workflowScheduler = workflowScheduler;
         }
 
-        [ActivityProperty(Hint = "The id of the timer (Cron, StartAt, Timer) activity, which is to be cleared")]
+        [ActivityProperty(Hint = "The ID of the timer (Cron, StartAt, Timer) activity, which is to be cleared.", SupportedSyntaxes = new[] { SyntaxNames.JavaScript, SyntaxNames.Liquid })]
         public string ActivityId { get; set; } = default!;
 
         protected override async ValueTask<IActivityExecutionResult> OnExecuteAsync(ActivityExecutionContext context)
@@ -28,4 +28,4 @@ namespace Elsa.Activities.Temporal
             return Done();
         }
     }
-}
+}
\ No newline at end of file
diff --git a/src/activities/Elsa.Activities.Temporal.Common/Activities/Cron/Cron.cs b/src/activities/Elsa.Activities.Temporal.Common/Activities/Cron/Cron.cs
index ee446e83c..31b2fb0a2 100644
--- a/src/activities/Elsa.Activities.Temporal.Common/Activities/Cron/Cron.cs
+++ b/src/activities/Elsa.Activities.Temporal.Common/Activities/Cron/Cron.cs
@@ -2,6 +2,7 @@ using System.Threading.Tasks;
 using Elsa.Activities.Temporal.Common.Services;
 using Elsa.ActivityResults;
 using Elsa.Attributes;
+using Elsa.Expressions;
 using Elsa.Persistence;
 using Elsa.Services;
 using Elsa.Services.Models;
@@ -30,7 +31,7 @@ namespace Elsa.Activities.Temporal
             _crontabParser = crontabParser;
         }
 
-        [ActivityProperty(Hint = "Specify a CRON expression. See https://crontab.guru/ for help.")]
+        [ActivityProperty(Hint = "Specify a CRON expression. See https://crontab.guru/ for help.", SupportedSyntaxes = new[] { SyntaxNames.JavaScript, SyntaxNames.Liquid })]
         public string CronExpression { get; set; } = "* * * * *";
 
         public Instant? ExecuteAt
diff --git a/src/activities/Elsa.Activities.Temporal.Common/Activities/StartAt/StartAt.cs b/src/activities/Elsa.Activities.Temporal.Common/Activities/StartAt/StartAt.cs
index 4331c0a5e..1721946d2 100644
--- a/src/activities/Elsa.Activities.Temporal.Common/Activities/StartAt/StartAt.cs
+++ b/src/activities/Elsa.Activities.Temporal.Common/Activities/StartAt/StartAt.cs
@@ -1,6 +1,7 @@
 using Elsa.Activities.Temporal.Common.ActivityResults;
 using Elsa.ActivityResults;
 using Elsa.Attributes;
+using Elsa.Expressions;
 using Elsa.Services;
 using Elsa.Services.Models;
 using Microsoft.Extensions.Logging;
@@ -27,7 +28,7 @@ namespace Elsa.Activities.Temporal
             _logger = logger;
         }
 
-        [ActivityProperty(Hint = "An instant in the future at which this activity should execute.")]
+        [ActivityProperty(Hint = "An instant in the future at which this activity should execute.", SupportedSyntaxes = new[] { SyntaxNames.JavaScript, SyntaxNames.Liquid })]
         public Instant Instant { get; set; }
 
         public Instant? ExecuteAt
diff --git a/src/activities/Elsa.Activities.Temporal.Common/Activities/Timer/Timer.cs b/src/activities/Elsa.Activities.Temporal.Common/Activities/Timer/Timer.cs
index 2a16b884e..a7c4cb69d 100644
--- a/src/activities/Elsa.Activities.Temporal.Common/Activities/Timer/Timer.cs
+++ b/src/activities/Elsa.Activities.Temporal.Common/Activities/Timer/Timer.cs
@@ -1,6 +1,7 @@
 using Elsa.Activities.Temporal.Common.ActivityResults;
 using Elsa.ActivityResults;
 using Elsa.Attributes;
+using Elsa.Expressions;
 using Elsa.Services;
 using Elsa.Services.Models;
 using Microsoft.Extensions.Logging;
@@ -21,7 +22,7 @@ namespace Elsa.Activities.Temporal
             _logger = logger;
         }
 
-        [ActivityProperty(Hint = "The time interval at which this activity should tick.")]
+        [ActivityProperty(Hint = "The time interval at which this activity should tick.", SupportedSyntaxes = new[] { SyntaxNames.JavaScript, SyntaxNames.Liquid })]
         public Duration Timeout { get; set; } = default!;
 
         public Instant? ExecuteAt