If you could erase one event from history, what would it be?

I want to re-live childhood days because childhood days ate memorable days without any tension or depression. Presently, younger age are full of challenges and struggles with stressed or depressed life but childhood days are full of enjoyment by playing several sports with my childhood friends.

Due to not getting a good job, younger life is my worst life with stressed or depressed life. I am not happy in the present time. Younger life is full of tension and stressed so I want to re-live childhood days with full enjoyment and memorable days with my parents.