What is let bygones be bygones?

"Let bygones be bygones" is an idiom that means to forget about past offenses or disagreements and move on. It encourages reconciliation and avoiding dwelling on past hurts. It's a call for forgiveness and acceptance. The expression suggests that holding onto resentment or past grievances is unproductive and hinders future relationships and peace. It implies that the past cannot be changed, and focusing on it only causes further pain or conflict. The phrase is often used to encourage people to reconcile after a dispute or disagreement, or to simply let go of past mistakes. It is about focusing on the present and future rather than dwelling on the past.