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Welcome to the Calendar Wiki! This is a site all about calendars - historical ones, new ones, and discussions about them: for the scientist, astronomer and the calendar enthusiast.
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Featured articleSymmetry454 Calendar (Sym454) is a proposal for Gregorian calendar reform developed by Dr. Irv Bromberg of the University of Toronto, Canada.
It is a perpetual solar calendar that conserves the traditional 7-day week, has symmetrical equal quarters, and starts every month on Monday. All months have a whole number of weeks, so no month ever has a partial week. Each day number within a month falls on the same weekday in all months. All holidays, birthdays, anniversaries, etc. are permanently fixed. All ordinal day and week numbers within the year are also permanently fixed.
Where to start
Here are some good places to start learning about calendars:
Some future proposed pages (feel free to click the link and start them):