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A leap year (also known as an intercalary year or bissextile year) is a calendar year that contains an additional day (or, in the case of a lunisolar calendar, a month) compared to a common year. The 366th day (or 13th month) is added to keep the calendar year synchronised with the astronomical year or seasonal year . [ 1 ]
To get the same mean year as the Gregorian Calendar this leap week is added to 71 of the 400 years in the cycle. The years with leap week are years whose last two digits are a number that is divisible by six (including 00) or 99: however, if a year number ending in 00 is divisible by 400, then Pax is cancelled.
This is the only leap year when the start of Daylight Saving Time and Labor Day are 183 days apart. They are 176 days apart in all other leap years. Grandparents' Day falls on its latest possible date, September 13. This is the only leap year when Memorial Day and Grandparent’s Day are 111 days apart. They are 104 days apart in all other leap ...
The last leap day occurred on Saturday, Feb. 29, 2020, making 2020 the last leap year. Other previous leap years this century include 2016, 2012, 2008, 2004 and 2000.
As mentioned, leap years typically take place every four years. That means the next leap years coming up after 2024 are 2028, 2032, 2036, 2040, 2044 and 2048. But again, it's not quite that easy.
However, because they can be evenly divided by 400, the years 1600 and 2020, were both leap century years. If you want to mark your calendar, the next leap century year will occur in 2400.
A leap year has one more day, so the year following a leap year begins on the second day of the week after the leap year began. Every four years, the starting weekday advances five days, so over a 28-year period, it advances 35, returning to the same place in both the leap year progression and the starting weekday.
Like all leap year types, the one starting with 1 January on a Sunday occurs exactly once in a 28-year cycle in the Julian calendar, i.e., in 3.57% of years. As the Julian calendar repeats after 28 years, it will also repeat after 700 years, i.e., 25 cycles. The formula gives the year's position in the cycle ((year + 8) mod 28) + 1).