A leap week calendar is a calendar system with a whole number of weeks every year, and with every year starting on the same weekday. Most leap week calendars are proposed reforms to the civil calendar, in order to achieve a perennial calendar. Some, however, such as the ISO week date calendar, are simply conveniences for specific purposes.
The ISO calendar in question is a variation of the Gregorian calendar that is used (mainly) in government and business for fiscal years, as well as in timekeeping. In this system a year (ISO year) has 52 or 53 full weeks (364 or 371 days).
Leap week calendars vary on whether the concept of month is preserved and whether the month (if preserved) has a whole number of weeks. The Pax Calendar, Hanke-Henry Permanent Calendar and CCC&T preserve or modify the Gregorian month structure. The ISO week date and the Weekdate Dating System are examples of leap week calendars that eliminate the month.
Most leap week calendars take advantage of the 400-year cycle of the Gregorian calendar, having exactly 20,871 weeks. With 329 common years of 52 weeks, plus 71 leap years of 53 weeks, leap week calendars can synchronize with the Gregorian every 400 years.
Read more about Leap Week Calendar: Advantages, Disadvantages, Year Structures
Famous quotes containing the words leap, week and/or calendar:
“That’s one small step for a man, one giant leap for mankind.”
—Neil Armstrong (b. 1930)
“A friend and I flew south with our children. During the week we spent together I took off my shoes, let down my hair, took apart my psyche, cleaned the pieces, and put them together again in much improved condition. I feel like a car that’s just had a tune-up. Only another woman could have acted as the mechanic.”
—Anna Quindlen (20th century)
“To divide one’s life by years is of course to tumble into a trap set by our own arithmetic. The calendar consents to carry on its dull wall-existence by the arbitrary timetables we have drawn up in consultation with those permanent commuters, Earth and Sun. But we, unlike trees, need grow no annual rings.”
—Clifton Fadiman (b. 1904)