HM King Chulalongkorn Memorial Day (in lieu) is a public holiday in Thailand, known locally as ชดเชยวันปิยมหาราช.
In 2026 it falls on Monday 25 October; in 2027 on Monday 25 October.
Dates, 2025 to 2028
| Year | Date | Weekday | Note |
|---|---|---|---|
| 2025 | not a holiday this year | ||
| 2026 | not a holiday this year | ||
| 2027 | 25 October | Monday long weekend | |
| 2028 | not a holiday this year | ||