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When is Autumnal Equinox Day in 2026 in Japan?

Autumnal Equinox Day 2026 is on Wednesday, 2026-09-23

Autumnal Equinox Day in Japan falls on Wednesday, September 23, 2026. That is week 39 of 2026 (ISO week numbering), day 266 of the year. Locally it is also written as: 秋分の日.

Days until Autumnal Equinox Day 2026

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Autumnal Equinox Day by year in Japan

YearWeekdayDateISO week
2026Wednesday2026-09-2339this page
2027Thursday2027-09-23382027 page

Public holidays near this date in Japan 2026

DateDayHolidayDeducted from working days
2026-09-21Monday敬老の日Yes
2026-09-23Wednesday秋分の日Yes

Working days around this holiday

The September 2026 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 2026 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 2026-09-23 is a Wednesday on any perpetual calendar.

Other questions about Autumnal Equinox Day