Why is July 14 also called Ghost Festival?

July 14 Ghost Festival, originally meant to congratulate and thank, originated in India in the 5th century BC. There is a record in the Cangue Blue Sutra, a Buddhist scripture: Mu Lian, the most powerful disciple under the throne of Buddha, her mother did too much evil before her death, and after her death, she fell into endless hell in A Bi and suffered endless hardships. Although Manglietia was the most powerful, she always watched her mother suffer and was helpless, so she turned to the Buddha for help. On July 15, the Buddha instructed Manglietia to ask ten monks to fast and wait for ten monks to recite scriptures for Manglietia's mother, so as to harass the ghost of Manglietia's mother and let Manglietia's mother get peace. Because July 15 is close to the harvest season, it is the most important time of the year, neither too hot nor too cold, and it is most suitable for wandering souls. Later generations followed suit and hosted a banquet for ten monks on July 15, hoping that their ancestors would get peace after their death. This story and custom spread from the mage to China. Surprisingly, people in China think that instead of asking monks to fast, they might as well offer offerings to ghosts who troubled their ancestors. Slowly, the Yulan Festival on July 15 was changed from China to the Ghost Festival on July 14. On this day, every household places offerings to offer sacrifices to their ancestors, and also to the nearby ghosts, hoping that their homes will be safe and their ancestors will be safe. It is generally believed that July 14 is the day when the gates of hell are wide open, so few people go out at night. This is just a one-sided idea. In fact, the ghost gate was opened and closed before midnight on July 14, that is, before July 15 12. According to ancient records, this time should be the deadline for ghosts to return to the underworld.