>>5535
https://en.wikipedia.org/wiki/International_Fixed_Calendar#History
Advantages
The several advantages of The International Fixed Calendar are mainly related to its organization.
- Every year has exactly 52 weeks divided in 13 months.
- Each month has exactly 28 days divided in 4 weeks.
- The calendar is the same every year (perennial), unlike the annual Gregorian calendar, which differs from year to year. Hence, scheduling is easier for institutions and industries with extended production cycles.
- Every day of the month falls on the same weekday in each month—the 17th always falls on a Tuesday, for example.
- Moveable holidays celebrated on the nth weekday of a month, such as Labor Day, would be able to have a fixed date while keeping their traditional weekday.
- Statistical comparisons by months are more accurate, since all months contain exactly the same number of business days and weekends; likewise for comparisons by 13-week quarters.
- Thirteen equal divisions of the year are superior to twelve unequal divisions in terms of monthly cash flow in the economy, or so supporters of the IFC argued.[10]
Disadvantages
- For the superstitious, a disadvantage to this format is that every month includes a Friday the 13th, and this date occurs thirteen times every year. This is readily solved by making the 1st a Monday.
- Thirteen, being prime, is not evenly divisible, putting all activities currently done on a quarterly basis out of alignment with the months; each quarter would be 13 weeks instead.
- Some Jewish, Christian, and Islamic groups have been historically opposed to the calendar because their tradition of worshiping every seventh day would result in either the day of the week of worship changing from year to year or eight days passing when Year Day or Leap Day occurs.[11] Others have contended that Year Day and Leap Day could be counted as additional days of worship.
- Birthdays and other significant anniversaries may be recalculated as a result of a calendar reform and would always be on the same day of the week, meaning that some would be more difficult to celebrate if not on a weekend or other non-workday.