Home Global Holiday Calendar Global Holiday Calendar Japan Japan: Mountain Day (in lieu) Japan: Mountain Day (in lieu) View all events Download Add to Calendar Export to other calendar/iCal When: August 9, 2021 all-day 2021-08-09T00:00:00+00:00 2021-08-10T00:00:00+00:00 Japan Japan: Mountain Day (in lieu) Note : These holidays are subject to change as per local regulations of the respective country. Print