Jisho

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Expression, Noun
1. Autumnal Equinox Day (national holiday; September 22, 23 or 24)
Wikipedia definition
2. Autumnal Equinox Dayis 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 on 1948. In 1947 and before, it was the date of Shūki kōreisai, an event relating to Shintoism.
Read “Autumnal Equinox Day” on English Wikipedia
Read “秋分の日” on Japanese Wikipedia
Read “Autumnal Equinox Day” on DBpedia

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