From Xojo Documentation

Read-Only Property (As Date )
DateValue = aConsoleApplication.BuildDate

New in 2005

Supported for all project types and targets.

Contains the date and time when the application was built.


You can also access the CreationDate property of the application's FolderItem by calling App.ExecutableFile.CreationDate.

Sample Code

The following code gets the build date and displays it in the System Debug Log:

Var d As Date
d = App.BuildDate
System.DebugLog("Build Date: " + d.AbbreviatedDate)