Hi Delore, and welcome to the forum.
What you're after can be done, but it requires a macro to do it. Not a big deal, and will most likely be easy to write, but we'd need to know a few things...
Would you want the date tagged in the file as of last edit date, or on each line? What if someone goes back and edits the data after your cutoff period... would that overwrite the date, or leave it as is? Do you want the user the be able to edit the date timestamp, or even see it?
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