Foundation Day is a public holiday in Japan, known locally as 建国記念の日.
In 2026 it falls on Wednesday 11 February; in 2027 on Thursday 11 February.
The date is fixed, so only the weekday changes from year to year.
Dates, 2025 to 2028
| Year | Date | Weekday | Note |
|---|---|---|---|
| 2025 | 11 February | Tuesday | |
| 2026 | 11 February | Wednesday | |
| 2027 | 11 February | Thursday | |
| 2028 | 11 February | Friday long weekend |