Feast days for the council of four realms or all of the civil rites of hầu đồng in the Viet beliefs in the Mother Goddesses of Four Realms are very plentiful. These all depend on local custom of each area.
Chầu văn or hát văn, also known as hát bóng originated in the Northen Delta region of Vietnam. This is considered as a form of ritual singing in the Viet beliefs of Mother Goddesses Of Three – Four Realms
The princes in Four Palaces Region or The princes in the Viet beliefs in the Mother Goddess of Four Realms are Ten Princes in The Mother Goddess Worshipping with another name, Thập vị Ông Hoàng.