Autumnal Equinox Day

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Autumnal Equinox Day
Official nameAutumnal Equinox Day
Observed byJapan
SignificanceCommemorates the autumnal equinox
DateAutumnal equinox

Autumnal Equinox Day (秋分の日, Shūbun no Hi) is a public holiday in Japan that usually occurs on September 22 or 23, the date of Southward equinox in Japan Standard Time (autumnal equinox can occur on different dates for different timezones). 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 Shintoism. 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.

Recent Japanese equinoxes[edit]

Past observed and future calculated equinoxes in Japan Standard Time.[1]

Year Vernal Day of week Autumnal Day of week
2013 March 20 Wednesday September 23 Monday
2014 March 21 Friday September 23 Tuesday
2015 March 21 Saturday September 23 Wednesday
2016 March 20 Sunday September 22 Thursday
2017 March 20 Monday September 23 Saturday
2018 March 21 Wednesday September 23 Sunday
2019 March 21 Thursday September 23 Monday

See also[edit]