lha babs dus chen

ལྷ་བབས་དུས་ཆེན
the Divine Descent (ceremony on the 22nd day of the 8th Tibetan month) [JV]

'the great festival where he descended from the gods' [RY]

the Festival of Heavenly Descent, Festival of the Descent from Heaven (Rigpa Wiki: "one of the four major Buddhist holidays. It occurs on the 22nd day of the ninth Tibetan month [usually in early-mid November]. Buddha’s mother Mayadevi was reborn in Indra’s heaven. To repay her kindness and to liberate her, and also to benefit the gods, Buddha spent three months teachings in the realm of the gods [where he taught her the Abhidharma teachings]. When he was about to return to this world, Indra and Brahma manifested three stairs of 80,000 yojanas each reaching this world in Sankisa. As the Buddha walked down the central one, they accompanied him to his left and right carrying umbrellas to honour him. He descended to earth in Sankisa, which is located in modern Uttar Pradesh, and which is counted among the eight holy places."] [Erick Tsiknopoulos]