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When is Foundation Day in 2026 in Japan?

Foundation Day 2026 is on Wednesday, 2026-02-11

Foundation Day in Japan falls on Wednesday, February 11, 2026. That is week 7 of 2026 (ISO week numbering), day 42 of the year. Locally it is also written as: 建国記念の日.

Days until Foundation Day 2026

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Foundation Day by year in Japan

YearWeekdayDateISO week
2026Wednesday2026-02-117this page
2027Thursday2027-02-1162027 page

Public holidays near this date in Japan 2026

DateDayHolidayDeducted from working days
2026-02-11Wednesday建国記念の日Yes

Working days around this holiday

The February 2026 business-days page shows the exact count of working days in the month this holiday falls in, with the holiday deducted and every remaining day listed. The full Japan 2026 holiday list marks whether this date is nationwide (Yes) or regional only.

How the date is verified: the date and weekday above are computed from the calendar, not typed in, and ISO week numbers follow ISO 8601 (weeks start Monday). You can reproduce both by checking that 2026-02-11 is a Wednesday on any perpetual calendar.

Other questions about Foundation Day