Unduvap Full Moon Poya Day is a public holiday in Sri Lanka, known locally as උඳුවප් පුර පසළොස්වක පෝය දිනය.
In 2026 it falls on Wednesday 23 December.
Dates, 2025 to 2028
| Year | Date | Weekday | Note |
|---|---|---|---|
| 2025 | 4 December | Thursday | |
| 2026 | 23 December | Wednesday | |
| 2027 | not a holiday this year | ||
| 2028 | not a holiday this year | ||