May 2026 in Japan
5 holidays / observances this month. Notable dates include International Workers' Day, Constitution Day, Greenery Day, and more. See the full 2026 calendar or holidays list.
Calendar
May 2026 — Japan
Full May 2026 calendar for Japan. Tap a marked day for holiday details.
Public / federal holidayObservanceInternational dayToday
May 2026
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Holidays in May
5 dates
International Workers' Day
Fri, May 1 · Observance
Constitution Day
Sun, May 3 · Public holiday
Greenery Day
Mon, May 4 · Public holiday
Children's Day
Tue, May 5 · Public holiday
Constitution Day (substitute day)
Wed, May 6 · Public holiday