HM King Maha Vajiralongkorn's Birthday is a public holiday in Thailand, known locally as วันเฉลิมพระชนมพรรษาพระบาทสมเด็จพระปรเมนทรรามาธิบดีศรีสินทรมหาวชิราลงกรณ พระวชิรเกล้าเจ้าอยู่หัว.
In 2026 it falls on Tuesday 28 July; in 2027 on Wednesday 28 July.
The date is fixed, so only the weekday changes from year to year.
Dates, 2025 to 2028
| Year | Date | Weekday | Note |
|---|---|---|---|
| 2025 | 28 July | Monday long weekend | |
| 2026 | 28 July | Tuesday | |
| 2027 | 28 July | Wednesday | |
| 2028 | 28 July | Friday long weekend |