Sultan Hassanal Bolkiah's Birthday is a public holiday in Brunei, known locally as Hari Keputeraan KDYMM Sultan Brunei.
In 2026 it falls on Wednesday 15 July; in 2027 on Thursday 15 July.
The date is fixed, so only the weekday changes from year to year.
Dates, 2025 to 2028
| Year | Date | Weekday | Note |
|---|---|---|---|
| 2025 | 15 July | Tuesday | |
| 2026 | 15 July | Wednesday | |
| 2027 | 15 July | Thursday | |
| 2028 | 15 July | Saturday weekend |