Secular perpetual calendar
Rare variant of the perpetual calendar, which also takes into account the long-term exclusion rules for determining the leap years partially
100s rule = 1900, 2100, 2200, … are no leap years, or even completely
400s rule = 2000, 2400, … again are leap years.
secular_perpetual_calendar.txt · Last modified: 11.10.2021 17:01 (external edit)