The annual honoring of ancestors is celebrated by the various Buddhist ethnic communities at different times of the year, and is known by different names including Ullambana, Yu-lan-p’en, Obon, Vu-lan, the Obon Festival, Vietnamese Mothers’ Day and Ancestors’ Memorial Day. In each case, the day is spent by monks and laity alike dedicating offerings to the Three Treasures (Buddha, Dharma, Sangha) on behalf of their parents and ancestors.