Sri Lanka Poya günleri, Lord Buddha'nın hayatındaki olayları anan aylık Budist bayramlarıdır. Yılda 12 Poya günü vardır ve her biri belirli bir olaya adanmıştır. Bu günler Sri Lanka kültüründe önemlidir ve dini faaliyetler ve törenlerle kutlanır.
Poya is the name given to the Lunar monthly Buddhist holiday of Uposatha in Sri Lanka, where it is a civil and bank holiday. Full moon day is normally considered as the poya day in every month. A Poya occurs every full moon. Uposatha is important to Buddhists all around the world, who have adopted the lunar calendar for their religious observances. Owing to the moon's fullness of size as well as its effulgence, the full moon day is treated as the most auspicious of the four lunar phases occurring once every lunar month (29.5 days) and thus marked by a holiday.
