The national holidays of Japan and the other days off under the Act on National Holidays, as the Cabinet Office lists them. Weekends are left open: the calendar that uses this one closes its own. The English version of 国民の祝日.cal
holidays = data/syukujitsu.csv (sha256:cec37a743c96995c, a copy of https://www8.cao.go.jp/chosei/shukujitsu/syukujitsu.csv, covers 1955-01-01..2027-12-31)
koyomi
0.38.0
koyomi 0.38.0 made this page by checking the files above. If a file's digest is no longer what it says here, the page is out of date.
Times are given at the UTC offset +09:00.
Closed days
These days are closed.
the days the table holidays lists closed holidays
Sources and the days the calendar knows
holidays: 1,067 rows, a copy of https://www8.cao.go.jp/chosei/shukujitsu/syukujitsu.csv, pinned at sha256:cec37a743c96995c; it lists every closed day from 1955-01-01 to 2027-12-31.
The calendar knows 1955-01-01..2027-12-31. A computation that asks whether a day outside it is a business day stops, in the check and in the generated code alike.
Business days
Year
Business days
Closed days
2026
347
18
2027
348
17
The longest run of closed days in 2026-01..2027-12 is 2026-05-03..2026-05-06, 4 days.