National Father's Day is a public holiday in Thailand, known locally as วันพ่อแห่งชาติ.
In 2026 it falls on Saturday 5 December; in 2027 on Sunday 5 December.
The date is fixed, so only the weekday changes from year to year.
Dates, 2025 to 2028
| Year | Date | Weekday | Note |
|---|---|---|---|
| 2025 | 5 December | Friday long weekend | |
| 2026 | 5 December | Saturday weekend | |
| 2027 | 5 December | Sunday weekend | |
| 2028 | 5 December | Tuesday |