Cry over spilt milk
Definition 1 of 1
Pro Tip 1/3Avoid Past Regrets
Use to discourage dwelling on past actions that can't be changed. 
You missed the job deadline, but don't cry over spilt milk — let's find a new opportunity.
Pro Tip 2/3Moving Forward
Emphasizes focusing on the present and future instead of the past. 
We lost the game, but there's no use crying over spilt milk—we have to practice for the next one.
Pro Tip 3/3Informal Tone
Typically used in casual conversation, not in formal settings. 
I know you broke your phone, but no point crying over spilt milk, mate.