what's done is done

Idioms  

1. There is no changing something; it's finished or final. For example, I forgot to include my dividend income in my tax return but what's done is done—I've already mailed the form. This expression uses done in the sense of “ended” or “settled,” a usage dating from the first half of the 1400s.

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Example Sentences

But what’s done is done, and it’s time to move on.

From Washington Post • Mar. 20, 2023

"It's pointless me whinging about the red card, what's done is done."

From BBC • Feb. 13, 2021

My husband feels that what’s done is done, but I can’t move past my anger and the disappointment I feel for my godson.

From Slate • Jun. 25, 2018

“Listen, what’s done is done and they are where they are,” Henkes said.

From Seattle Times • Jan. 20, 2018

“Well, you shan’t blame me for what’s happened. I warned you. However, what’s done is done and there’s no sense complaining. No use in it at all.”

From "The Black Cauldron" by Lloyd Alexander