Add note about ticks() correct return value

Author: ecfan

articles/logic-apps/workflow-definition-language-functions-reference.md

@@ -4103,8 +4103,13 @@ And return these results:
 
 ### ticks
 
-Return the `ticks` property value for a specified timestamp.
-A *tick* is a 100-nanosecond interval.
+Return the `ticks` property value for a specified timestamp. A *tick* is a 100-nanosecond interval.
+
+> [!NOTE]
+> Contrary to the function's tooltip description, this function returns the number of 100-nanosecond 
+> intervals since January 1, 0001 12:00:00 midnight (or DateTime.Ticks in C#), and *not January 1, 1601*. 
+> For more information, see this topic: 
+> [DateTime.Ticks Property (System)](https://docs.microsoft.com/en-us/dotnet/api/system.datetime.ticks?view=netframework-4.7.2#remarks
 
 ```
 ticks('<timestamp>')