The anniversary of the death of Tsongkhapa, the founder of the Gelukpa order. Houses, streets, and temples are lit by numerous lamps and it is also known as the 'Tsongkhapa Butter Lamp Festival'.

Tsong Khapa's Festival, falling on the 15th of the tenth month of the Tibetan calendar, marks the anniversary of the passing away of Tsong Khapa, the founder of Gelukpa Sect, and is called Ganden Angchuin in Tibetan. On this day, butter lamps are placed on the roofs of monasteries and secular homes and sutras are chanted in praise of Tsong Khapa.

In memory of the great reformer of Tibetan Buddhism, his death on that day in 1419 is still remembered. People burn butter lamps on the roofs and pray. In the evening, Tibetan dumplins are served as supper.