Wednesday, 11 August 2027
Confirmed — source checked
This is the first listed date for this year; a separate observance date has not been assigned.
Mountain Day is observed in Japan. Check the holiday dates, observance information and calendar details below.
Bank, office and school arrangements require the applicable authority or institution notice. Missing scope data does not mean open.
Wednesday, 11 August 2027 · Confirmed — source checked
Next listed holiday day on or after today; this can be a closure day rather than the festival date.
Recorded confirmation and independent source review are shown separately. An institution-specific notice does not establish closure for every employer or school.
Official public holiday law or calendar
Confirmed · Scope: public · Checked 2026-09-27
Japan’s Cabinet Office tables establish 2026 and 2027, including substitute and citizen’s holidays. The 2028 equinoxes remain provisional until the Cabinet Office publishes the annual list in February 2027.
View all Japan public holidays 2027