Poson Full Moon Poya Day in Sri Lanka

Meaning and history

Poson is observed as a day of national as well as religious importance in Sri Lanka. The country’s official cultural heritage handbook describes it as marking the introduction of Buddhism to the island by a group led by Arhat Mahinda Thera, and links that event with the growth of a distinctive Sri Lankan culture.[1]

Mihintale is central to the story: the heritage account places Mahinda’s meeting with King Devanampiyatissa in the hills known as Missaka. The account says Mahinda taught the king about the Buddha, the Dhamma and the Sangha, and that the king and his companions accepted Buddhism.[1]

How people observe Poson

The main celebration site on Poya is Mihintale, where devotees gather, while Buddhist temples across the island hold religious events. Streets are decorated with lanterns and illuminated displays depicting events in the Buddha’s life.[2]

The commemorations are not limited to the full moon day. Sri Lanka’s heritage handbook describes Poson observances as beginning with the June full moon and continuing for about a week, with Anuradhapura and Mihintale as the principal centres.[1] Check with local organisers for details of foods and customs.

Public holiday and practical effects

Under Sri Lanka’s Holidays Act, every Full Moon Poya Day is a public holiday and a bank holiday. Banks must keep bank holidays closed; the Act also allows an order to exempt a public office or department from the holiday where needed to avoid disruption to essential services.[3] The Central Bank’s official holiday calendar lists Poson as both a bank and public holiday.[5]

The law requires shops and offices to grant employees a holiday on Full Moon Poya Day, subject to the statutory provisions for working on that day. Employees covered by Wages Board rules also receive a Poya holiday. If the day falls on a weekly holiday or half-holiday, the shop and office law does not provide an additional day in lieu; the Wages Boards law likewise says no additional weekly holiday is due when it coincides with the weekly holiday.[4]

Poya-day rules also require liquor outlets, meat stalls, nightclubs, dance halls and places of public performance to close, subject to the law’s stated exception for an approved public performance. The Act prohibits slaughtering animals for sale and selling animal flesh on a Poya day.[3] The law does not require every ordinary shop to close, so visitors should check specific businesses and local services before travelling.