the time when one was young; one's youth — used to talk about experiences or habits from an earlier, younger period of life.
若い頃は毎日ピアノを練習していました。
When I was young, I practiced the piano every day.
若い頃の写真を見て、懐かしくなった。
I felt nostalgic when I looked at photos from my youth.
若い頃は失敗を恐れず、いろいろなことに挑戦していた。
When I was young I wasn't afraid of failure and tried many things.