July 15th.
Hungry Ghost Festival is a Taoist name. Folklore calls it July 15th, July 14th, and Ancestor Worship Festival. Buddhism calls it the Bon Festival. The main festival customs include worshiping ancestors, setting off river lanterns, worshiping dead souls, burning paper ingots, and offering sacrifices to land. Its birth can be traced back to the ancestor worship and related festivals in ancient times. July is an auspicious month and a month of filial piety. The first half of July is a folk festival in early autumn to celebrate the harvest and reward the earth. When certain crops are ripe, it is customary for folk to worship their ancestors and use new rice as offerings to report the autumn harvest to their ancestors. This festival is a traditional cultural festival to remember ancestors. Its cultural core is to respect ancestors and show filial piety.