Vap Full Moon Poya day is a significant day for Buddhists because of the Katina Pinkama as well several other events which took place on this day.
Buddhist monks complete the Vassana kala or the rainy season sojourn on Vap Full Moon Poya Day. This three month period is very important for ‘Savanak Piris’ or four groups of the Buddhist community viz. “Bhikkhus” –monks, “Bhikkhunis” nuns, “Upasaka“–lay male devotees, “Upasika” lay female devotees, because this is the period of the year when they can accumulate merit in various ways. Buddhists perform a series of special religious activities, the most important of them is the Katina Cheevara pooja or offering of robes to the Maha Sangha.
Listen to Ven. Siyabalapitiye Buddharakkitha thero explaining the history and the virtues of Katina puja,