Akriti Posted November 15, 2010 Report Share Posted November 15, 2010 Why the leap year test for centuries is deviding by 400 and not by 4? Quote Link to comment Share on other sites More sharing options...
0 Guest Posted November 15, 2010 Report Share Posted November 15, 2010 Years that are evenly divisible by 100 are not leap years, unless they are also evenly divisible by 400, in which case they are leap years. Quote Link to comment Share on other sites More sharing options...
0 Guest Posted November 15, 2010 Report Share Posted November 15, 2010 The earth takes approximately 365 days, 5 hours, 48 minutes, and 40 seconds to make a complete orbit about the sun (if I remember correctly). Every four years the extra 5:48:40 is summed to make almost an additional day as what we know as Feb 29 on leap years. Furthermore, since it is short by 0:11:20, over the course of 100 years, the calender gets 20:26:40 ahead; therefore, every centery we do not add the leap year day to account for that overage. Then, over the course of 4 centuries the calender again gets corrected by adding that leap year back. I believe the fact that the earths rotation is 23:54:04 (not exactly 24 hrs) gets factored in as well. Quote Link to comment Share on other sites More sharing options...
0 Akriti Posted November 15, 2010 Author Report Share Posted November 15, 2010 Thanks for all your answers Quote Link to comment Share on other sites More sharing options...
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Akriti
Why the leap year test for centuries is deviding by 400 and not by 4?
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