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When is Mountain Day in 2026 in Japan?

Mountain Day 2026 is on Tuesday, 2026-08-11

Mountain Day in Japan falls on Tuesday, August 11, 2026. That is week 33 of 2026 (ISO week numbering), day 223 of the year. Locally it is also written as: 山の日.

Days until Mountain Day 2026

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Mountain Day by year in Japan

YearWeekdayDateISO week
2026Tuesday2026-08-1133this page
2027Wednesday2027-08-11322027 page

Public holidays near this date in Japan 2026

DateDayHolidayDeducted from working days
2026-08-11Tuesday山の日Yes

Working days around this holiday

The August 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 2026-08-11 is a Tuesday on any perpetual calendar.

Other questions about Mountain Day