Astronomy

Autumnal Equinox Day

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    There are 7 days until Autumnal Equinox Day, on Wednesday, 23 September 2026.

    Public holiday in Japan.

    Autumnal Equinox Day is a public holiday in Japan that usually occurs on September 22 or 23, the date of Southward equinox in Japan Standard Time. Due to the necessity of recent astronomical measurements, the date of the holiday is not officially declared until February of the previous year. Autumnal Equinox Day became a public holiday in 1948. In 1947 and before, it was the date of Shūki kōreisai (秋季皇霊祭), an event relating to Shinto. Like other holidays, this holiday was repackaged as a non-religious holiday for the sake of separation of religion and state in Japan's postwar constitution.

    Summary from Wikipedia (CC BY-SA 4.0)

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    Japan
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    Last verified Sep 14, 2026

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