Denshi Jisho — Online Japanese dictionary

Found 3 sentences.

十五 A wonder lasts but nine days.
一月十五まで図書館返却なければならない I've got to take my library books back before January 25th.
そん失敗んて気にする。人の噂も七十五日。みんすぐに忘れる I wouldn't let a goof-up like that get to you. People have short memories and the one good thing about gossip is that it's short-lived.