let bygones be bygones suomeksi - Sanakirja.org (englanti-suomi)

Käännös		Konteksti
Verbit
1.	se on ollutta ja mennyttä	idiomaattinen
2.	sitä tikulla silmään, joka vanhoja muistaa	idiomaattinen

(intransitive, idiomatic) To disregard or ignore a past difficulty in a relationship or an offence (when dealing with another individual).

To intrude as little of his personality as possible upon a gay event with which that personality could show nothing in keeping, he decided not to make his appearance till evening—when stiffness would have worn off, and a gentle wish to let bygones be bygones would exercise its say in all hearts.
You'll find, when you come back, I promise you, Kit, that everyone is willing to let bygones be bygones, and that you can make a fresh start.
But I ain't got no quarrel witcha. Just let bygones be bygones.