Access to project modified / compiled date in S7-1200 code?

I have a project with different revisions installed on CPUs at different sites, and I plan on making further revisions in the future. I would like a simple way to check the software revision that doesn't require Portal V11.

Can anyone tell me if it is possible to read the "modified on:" timestamp of a specific function block? Or any other way to determine when the project was last compiled? My plan is to display this information when a telnet connection is made to the CPU.

I can always store a date or value in the software and update it manually, but it would be much more reliable if the timestamp was updated automatically.