![leap years list leap years list](https://i1.wp.com/infographiclist.files.wordpress.com/2012/03/leapyear2012_4f6789ede5c61.jpg)
Every three years, you get to celebrate your birthday on March 1 and continue to grow old like the rest of us. Instead of your birthday occurring on a Tuesday as it would following a common year, during a leap year, your birthday “leaps” over Tuesday and will now occur on a Wednesday.Īnd if you happen to be born on leap day February 29, that doesn’t mean you only celebrate a birthday every four years. However, the addition of an extra day during a leap year means that your birthday now “leaps” over a day. That means that if your birthday were to occur on a Monday one year, the next year it should occur on a Tuesday. The next time a leap year will be skipped is the year 2100.Īnd why is it called “leap year?” Well, a common year is 52 weeks and 1 day long.
![leap years list leap years list](https://i0.wp.com/lessons4littleones.com/wp-content/uploads/2020/02/leap-year-facts-page.jpg)
The year 2000 was a leap year, for example, but the years 1700, 1800, and 1900 were not. The rule is that if the year is divisible by 100 and not divisible by 400, leap year is skipped. For this reason, not every four years is a leap year. Over time, these extra 44+ minutes would also cause the seasons to drift in our calendar.
![leap years list leap years list](http://jwilson.coe.uga.edu/EMAT6680Fa2013/Hendricks/Essay%201/table%201.jpg)
Rounding strikes again! By adding a leap day every four years, we actually make the calendar longer by over 44 minutes. Some simple math will show that over four years the difference between the calendar years and the sidereal year is not exactly 24 hours. This would be annoying if not devasting, because over a period of about 700 years our summers, which we’ve come to expect in June in the northern hemisphere, would begin to occur in December!īy adding an extra day every four years, our calendar years stay adjusted to the sidereal year, but that’s not quite right either. If we didn’t account for this extra time, the seasons would begin to drift. There are seven leap years in every 19 years. This “sidereal” year is slightly longer than the calendar year, and that extra 5 hours 48 minutes and 56 seconds needs to be accounted for somehow. During a Hebrew calendar leap year, an additional month of Adar is added. It takes Earth 365.242190 days to orbit the Sun, or 365 days 5 hours 48 minutes and 56 seconds. What’s going on and why do we have leap year?Ī calendar year is typically 365 days long. These so called “common years” loosely define the number of days it takes the Earth to complete one orbit around the Sun. For example, most people believe that leap year occurs once every four years, but that’s not always the case. Instead of 28 days, this year February will have 29 days. Almost everyone if familiar with the concept of leap year, but the reasoning behind it is a little complicated. The year is not a leap year (it has 365 days).In 2020, February gets an extra day.The year is a leap year (it has 366 days).If the year is evenly divisible by 400, go to step 4.If the year is evenly divisible by 100, go to step 3.If the year is evenly divisible by 4, go to step 2.To determine whether a year is a leap year, follow these steps:
#Leap years list how to#
How to determine whether a year is a leap year However, in order to be compatible with other programs, Microsoft Excel treats the year 1900 as a leap year. This is because they are evenly divisible by both 100 and 400.īecause versions of Microsoft Excel earlier than Excel 97 handle only years from 1900 to 2078, only the year 1900 is subject to the 100/400 exclusion rule of leap years in Microsoft Excel. The following years are leap years: 1600, 2000, 2400 This is because they are evenly divisible by 100 but not by 400. To eliminate this error, the Gregorian calendar stipulates that a year that is evenly divisible by 100 (for example, 1900) is a leap year only if it is also evenly divisible by 400.įor this reason, the following years are not leap years:ġ700, 1800, 1900, 2100, 2200, 2300, 2500, 2600 However, there is still a small error that must be accounted for. Any year that is evenly divisible by 4 is a leap year: for example, 1988, 1992, and 1996 are leap years. Because the actual length of a sidereal year (the time required for the Earth to revolve once about the Sun) is actually 365.2425 days, a "leap year" of 366 days is used once every four years to eliminate the error caused by three normal (but short) years. In the Gregorian calendar, a normal year consists of 365 days. This calendar was designed to correct the errors introduced by the less accurate Julian calendar. The date system that is used by Excel is based on the Gregorian calendar, first established in 1582 by Pope Gregory XIII. This article describes how to determine whether the year in a date that is used in a Microsoft Excel document is a leap year.