Coronation Day is a public holiday in Thailand, known locally as วันฉัตรมงคล.
In 2026 it falls on Monday 4 May; in 2027 on Tuesday 4 May.
The date is fixed, so only the weekday changes from year to year.
Dates, 2025 to 2028
| Year | Date | Weekday | Note |
|---|---|---|---|
| 2025 | 4 May | Sunday weekend | |
| 2026 | 4 May | Monday long weekend | |
| 2027 | 4 May | Tuesday | |
| 2028 | 4 May | Thursday |