Binara Pasalosvaka Poya occupies a significant place in the history of Buddha Sasana. It is on this Poya day, Bhikkhuni Sasana was founded.
The Vinaya Pitaka and Anguttara Nikaya give the following account on setting up the monastic order for women thus: At one time the Buddha was in Kapilavatthu and his step-mother, Maha-Pajapati Gotami asked permission to go forth into the homeless life.
Nikini full moon day falling due one month after the commencement of “Wassana Kala“the rainy season: is of special significance for Buddhists due to a number of incidents that took place on this day.
Commemorating the lord Buddha's first sermon and the arrival of the Tooth Relic in Sri Lanka, the Esala Full Moon Poyaday is celebrated today by the Buddhists all around the world.
Poson is a festival celebrated in Sri Lanka on the full moon day in June. Poson Poya is noteworthy to Sri Lankan Buddhists as the day on which Emperor Asoka's son, Arahant Mahinda, introduced Buddhism to the island in the 3rd century B.C.
Vesak falls in May in every year and it is considered as the largest poya in Sri lanka. It is considered as a cultural as well as religious festival. Other than Sri Lanka, Asian countries like India, Japan, Singapore, Taiwan, Indonesia and Nepal celebrate Vesak poya in grand way. Not only is that It now considered as an international holiday.