Custom maintained market holidays.
Currently supports XNYS and XTKS.
Holidays are based on gerrymanoim/exchange_calendars and references documented below.
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This calendar might not include holidays falling on Saturday and Sunday.
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For XTKS holidays calendar, the dates for Spring Equinox Day and Autumn Equinox Day two years ahead in the calendar have not been formally decided yet.
This is because, as public holidays, the official decision for these dates is made when the Calendar Outline is published on the official announcement site on February 1st of the previous year.
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Annual year end check and revision for the next year holidays would be required to maintain this calendar.
XNYS Holidays: https://www.nyse.com/markets/hours-calendars
XTKS Holidays: https://www.jpx.co.jp/english/corporate/about-jpx/calendar/
Spring & Autumn Equinox Day prediction: https://www.nao.ac.jp/faq/a0301.html
Japanese Holiday Official Announcements: https://eco.mtk.nao.ac.jp/koyomi/yoko/ (includes Spring & Autumn Equinox Day formal decisions)