Various reforms to the Gregorian calendar have been proposed. Most of them were motivated by the desire to make it easy to work out the day of week of a particular date. Amongst these proposed reforms was the International Fixed Calendar, the World calendar, and the Common-Civil-Calendar-and-Time. These make it easier to work out the day of week by having exactly 52 weeks in each year plus an extra day not belonging to any week and also having the leap day outside of any week. The remaining 364 days then form 52 weeks of 7 days. The World Calendar has every third month beginning on the same day of week and the International fixed calendar has all of its 13 months beginning on a Sunday.

Such calendars have the disadvantage of modifying the week, which is something that not all religious groups will observe. An alternative is to have years of exactly 364 days (52 weeks) or 371 days (53 weeks). See 53-week calendar for more about this.

See calculating the day of the week.

Specific proposals

There have been many specific calendar proposals including:

• Common-Civil-Calendar-and-Time: C&T
• 53-week calendar
• International Fixed Calendar
• Positivist Calendar
• Symmetry454
• World Calendar

External links

• Home page for Calendar Reform

• Johns Hopkins press release on C&T
• C&T calendar home page
• Slashdot discussion of Dick Henry's C&T
• Bob McClennon's Refomed Weekly Calendar (Leap week rule has a drafting error).