29 Feb '12, 1pm

“@worldtempus: LEAP DAY - February 29 Want to know more about Leap Day? Read this great article by @doerrelizabeth

“@worldtempus: LEAP DAY - February 29 Want to know more about Leap Day? Read this great article by @doerrelizabeth

This day is today, February 29. Its addition will mean that the year 2012 comprises 366 days as opposed to the usual 365. The extra day compensates for the fact that a mean time year (the time we read on the clocks, which is mathematically divided) is shorter than a solar year (the time literally dictated by the sun) by about six hours. As a solar year is just under 365.25 days, there is of course an exception to the leap year rule. Years that are divisible by 100 are not leap years unless they are also divisible by 400. This is a difficult rule to understand, so let’s look at the numbers. The years 1600 and 2000 were leap years according to this rule, but 2100 will not be. This is called a secular year, and just about every perpetual calendar system known will not be able to make the adjustment by themselves. Other calendar types that have leap years on par with the Grego...

Full article: http://www.worldtempus.com/en/news/top-news/detail/articl...

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