Japanの公的祝日 8月 2026

8月 2026 in Japan runs 31 calendar days, Northern-hemisphere summer and Southern-hemisphere winter. Japan observes one public holiday in 8月 2026: Mountain Day. One of those — Mountain Day — falls on a weekday and reduces the working-day count by one. That leaves 20 working days for Japan businesses, payroll cycles, and project schedules in 8月 2026. August is comparatively quiet in the Christian calendar but includes Assumption of Mary on the 15th in Catholic countries and several civic anniversaries across South America. For broader context, see the full 2026 calendar for Japan or the global view of holidays observed in 8月 2026 across all 190 countries we cover.