Feature request: filter to publish only posts after X date

Thank you for a great plugin.

I publish on my blog older posts as well sometimes, and would not like them to get posted on facebook.
Could you please add a feature so that a post will need to be after X date in order to qualify to be published? (either after X date, or relative – at least in the last day/week or similar. Either of the two would solve my issue)

Thank you very much!
Tal