Entry Meta per Post

Hello!

I’m aware that it is possible and quite easy do change the entry meta to show “post modified date” instead of “post date”.

What I wanted to know: is there any way that I could change this to a per post basis? Because sometimes all I do is update a few links and don’t want to display the date the post was modified, only when I actually make significant changes to the content.

If not through the Simple Edits plugin, maybe at the post edit page?

Thank you!