Hội Yến Diêu Trì (Religious Banquet for Great Mother and the Nine Goddesses), a great religious ceremony of Cao Dai, is annually held in Tây Ninh Holy See on the 15th of the eighth lunar month. This coincides with the Mid Autumn Festival in Vietnam. Most Caodaiists choose to go on a pilgrimage to Tay Ninh Holy Land on this day.