diff --git a/src/WebJobs.Script.WebHost/Diagnostics/LinuxAppServiceEventGenerator.cs b/src/WebJobs.Script.WebHost/Diagnostics/LinuxAppServiceEventGenerator.cs
index 03d2e80e7f..42bc70ce2e 100644
--- a/src/WebJobs.Script.WebHost/Diagnostics/LinuxAppServiceEventGenerator.cs
+++ b/src/WebJobs.Script.WebHost/Diagnostics/LinuxAppServiceEventGenerator.cs
@@ -110,7 +110,8 @@ private void WriteEvent(string eventPayload)
 
         public override void LogAzureMonitorDiagnosticLogEvent(LogLevel level, string resourceId, string operationName, string category, string regionName, string properties)
         {
-            _writeEvent($"{ScriptConstants.LinuxAzureMonitorEventStreamName} {(int)ToEventLevel(level)},{resourceId},{operationName},{category},{regionName},{NormalizeString(properties.Replace("'", string.Empty))},{DateTime.UtcNow}");
+            var timeStr = IsAzureMonitorTimeIsoFormatEnabled() ? DateTime.UtcNow.ToString("s") : DateTime.UtcNow.ToString();
+            _writeEvent($"{ScriptConstants.LinuxAzureMonitorEventStreamName} {(int)ToEventLevel(level)},{resourceId},{operationName},{category},{regionName},{NormalizeString(properties.Replace("'", string.Empty))},{timeStr}");
         }
 
         public static void LogUnhandledException(Exception e)
@@ -118,5 +119,19 @@ public static void LogUnhandledException(Exception e)
             // Pipe the unhandled exception to stdout as part of docker logs.
             Console.WriteLine($"Unhandled exception on {DateTime.UtcNow}: {e?.ToString()}");
         }
+
+        private bool IsAzureMonitorTimeIsoFormatEnabled()
+        {
+            string enabledString = Environment.GetEnvironmentVariable(EnvironmentSettingNames.AzureMonitorTimeIsoFormatEnabled);
+            if (bool.TryParse(enabledString, out bool result))
+            {
+                return result;
+            }
+            if (int.TryParse(enabledString, out int enabledInt))
+            {
+                return Convert.ToBoolean(enabledInt);
+            }
+            return false;
+        }
     }
 }
diff --git a/src/WebJobs.Script/Environment/EnvironmentSettingNames.cs b/src/WebJobs.Script/Environment/EnvironmentSettingNames.cs
index 4108e1a673..e7d3a70a59 100644
--- a/src/WebJobs.Script/Environment/EnvironmentSettingNames.cs
+++ b/src/WebJobs.Script/Environment/EnvironmentSettingNames.cs
@@ -71,6 +71,7 @@ public static class EnvironmentSettingNames
         public const string HealthPingEnabled = "WEBSITE_FUNCTIONS_HEALTH_PING_ENABLED";
         public const string TestDataCapEnabled = "WEBSITE_FUNCTIONS_TESTDATA_CAP_ENABLED";
         public const string AzureMonitorCategories = "WEBSITE_FUNCTIONS_AZUREMONITOR_CATEGORIES";
+        public const string AzureMonitorTimeIsoFormatEnabled = "FUNCTIONS_AZUREMONITOR_TIME_ISOFORMAT_ENABLED";
         public const string FunctionsRequestBodySizeLimit = "FUNCTIONS_REQUEST_BODY_SIZE_LIMIT";
         public const string FunctionsHostIdCheckLevel = "FUNCTIONS_HOSTID_CHECK_LEVEL";
         public const string FunctionsPlatformConfigFilePath = "FUNCTIONS_PLATFORM_CONFIG_FILE_PATH";