Buddhism is not about rituals and celebration, it is about liberation. Any rituals around "coming of age" would be attached to the cultures in which practitioners of Buddhism live.
Judaism has many holidays and Holy Days. The main holy days are:1 Rosh Hashanah - The Jewish New Year 2 Yom Kippur - Day of Atonement 3 Sukkot - Feast of Booths (or Tabernacles) 4 Pesach - Passover 5...