Unification Day is a public holiday in Bulgaria, known locally as Ден на Съединението.
In 2026 it falls on Sunday 6 September, with a substitute day off on Monday 7 September; in 2027 on Monday 6 September.
The date is fixed, so only the weekday changes from year to year.
Dates, 2025 to 2028
| Year | Date | Weekday | Note |
|---|---|---|---|
| 2025 | 6 September | Saturday weekend | |
| 2025 | 8 September | Monday long weekend | observed (moved) |
| 2026 | 6 September | Sunday weekend | |
| 2026 | 7 September | Monday long weekend | observed (moved) |
| 2027 | 6 September | Monday long weekend | |
| 2028 | 6 September | Wednesday |