Wesak is celebrated in Southeast Asia as well as in Hong Kong and Taiwan, but in East Asia where Mahayana Buddhism (Northern Buddhism) had spread, the birth of Buddha (called Kanbutsue, Buttan, Gotane, Busshoe, Yokubutsue, Ryugee or Birthday of Buddha) is celebrated in its place.
この祭りは東南アジアや香港・台湾などでも行われているが、大乗仏教（北伝仏教）の伝わった東アジアではウェーサーカ祭の代わりに灌仏会（佛誕、降誕会、仏生会、浴仏会、龍華会、釈迦誕生日）が行われる。