Adhi Poson Full Moon Poya Day in Sri Lanka
Adhi Poson Full Moon Poya Day is a Full Moon Poya holiday in Sri Lanka. Poson observances remember the introduction of Buddhism to the island and are associated with Mihintale, where tradition places the meeting of Arahant Mahinda and King Devanampiyatissa.[1][3]
A Poya day under Sri Lankan law
Sri Lanka’s Holidays Act declares every Full Moon Poya Day a public holiday and a bank holiday. It also says public holidays are to be kept as holidays and that banks must keep bank holidays as close holidays. The Central Bank’s holiday listing identifies Adhi Poson Full Moon Poya Day as both a public and bank holiday, confirming its place in the national calendar.[1][5]
For employees in shops and offices, the Department of Labour says a Full Moon Poya Day is a holiday. If it coincides with an employee’s weekly holiday or half-holiday, the guidance says no additional day off is due in lieu. The law and guidance establish these protections, but they do not mean that every private business must close.[2]
Poson’s meaning in Sri Lanka
Poson is closely tied to Sri Lanka’s Buddhist history. Sri Lanka Tourism describes the arrival of Mahinda, son of the Indian emperor Ashoka, and the conversion of King Devanampiyatissa as the event that brought Buddhism to the island. It identifies Mihintale as the place associated with their encounter and the name as meaning Mahinda’s mountain.[3]
Adhi Poson is named as a separate Poya observance in the Sri Lankan holiday calendar, alongside Poson Full Moon Poya Day. The named day is recognized as a Poya holiday, but the meaning of the prefix “Adhi” is unclear.[4][5]
Worship and Poson observances
Sri Lanka Tourism describes Poson as a day when devotees visit temples and spend time in meditation. It also reports sil campaigns, charitable food stalls known as dansals, devotional songs and illuminated pandols among the observances.[3]
Mihintale is a focal site for Poson because of its association with Mahinda and the king. Celebrations take place there and at Buddhist temples around the island. Visitors looking for ceremonies or events should check local temple or organizer information.[3]
What residents and visitors may notice
Banks close on bank holidays under the Holidays Act, and shop and office employees are entitled to a holiday on a Full Moon Poya Day under the Department of Labour’s guidance. Sri Lanka Tourism also notes that some shops and businesses close on Poya days. Individual opening hours can vary, so travelers should confirm directly with a business before visiting.[1][2][4]
The Sri Lanka Tourism authority says the sale of alcoholic beverages, meat and fish is prohibited on Full Moon Poya days. That makes it sensible to plan purchases and meals ahead, while checking with accommodation providers about available food services. Check public transport schedules before travelling.[4]
Frequently asked questions
Is Adhi Poson a public holiday in Sri Lanka?
Do shop and office employees get the day off?
The Department of Labour says shop and office employees receive a holiday on a Full Moon Poya Day. It says no additional day off in lieu is due if the Poya falls on their weekly holiday or half-holiday.[2]
Are banks closed?
Will shops and restaurants be open?
Some shops and businesses close on Poya days, and Sri Lanka Tourism says sales of alcoholic beverages, meat and fish are prohibited. Check with a specific shop, restaurant or hotel for its opening hours and food service.[4]
Why is Mihintale associated with Poson?
Sri Lanka Tourism connects Poson with Mahinda’s introduction of Buddhism to Sri Lanka and identifies Mihintale as the place associated with his meeting with King Devanampiyatissa.[3]
Sources and references
Sources used for Adhi Poson Full Moon Poya Day in Sri Lanka:
- HOLIDAYS ACT- Ministry of Science and Technology, Sri Lanka
- Salary/wages/Leave – Department of Labour- Department of Labour, Sri Lanka
- Poson Festival- Sri Lanka Tourism Promotion Bureau
- Sri Lankan Public Holidays 2026- Sri Lanka Tourism Promotion Bureau
- Central Bank of Sri Lanka - Bank Holidays for 2026- Central Bank of Sri Lanka