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When is Mountain Day in 2027 in Japan?

Mountain Day 2027 is on Wednesday, 2027-08-11

Mountain Day in Japan falls on Wednesday, August 11, 2027. That is week 32 of 2027 (ISO week numbering), day 223 of the year. Locally it is also written as: 山の日.

Days until Mountain Day 2027

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Mountain Day by year in Japan

YearWeekdayDateISO week
2027Wednesday2027-08-1132this page
2026Tuesday2026-08-11332026 page

Public holidays near this date in Japan 2027

DateDayHolidayDeducted from working days
2027-08-11Wednesday山の日Yes

Working days around this holiday

The August 2027 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 2027 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 2027-08-11 is a Wednesday on any perpetual calendar.

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