Lha Bab Düchen (lha babs dus chen) in Tibetan translates as "Festival of the Descent from Heaven" the fourth major Buddhist holiday occurs on the 22nd day of the ninth Tibetan lunar month.
This day is celebrated to observe Buddha’s descent from The Heaven of Thirty-Three to earth. In order to repay his mother’s kindness and to liberate her, Buddha spent three months of teachings in the realm of the gods where she was reborn.