Achievement date editing

Am I able to edit the dates of achievements I have unlocked?

It cannot be changed if you already unlocked it and synced it with the live servers. You can be changed if it is a new achievement.

I see, thanks. I’m trying to basically make my original xbox account since as ms says “it’s gone forever” due to yahoo deleting email accounts that haven’t been used in a while. Not gonna ask how risky unlocking them via the tool is because I see people say it’s a ban on site any time it’s brought up.