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rdslon01@mik.uky.edu (rodney d slone) writes:
|> Well it will be 2/28/2000 -> 2/29/2000 because if
|> year mod 400 == 0 then leap year
|> else if
|> year mod 100 == 0 then not leap year
|> else if
|> year mod 4 == 0 then leap year
|> else not leap year
Looks like the US IRS came up with these rules!
The reason for the leap years is that the calendar "drifts" in regards
to the equinoxes. That is why Othrodox Christmas is in January. The
fractional part of the number of days in a year causes the drift.
The rules use to be simpler but drift still occurred. The rules were
then made more complex to make the drift even less. The simpler
version would work if the year was exactly 365.25 days.
73 Eric WB1HBU
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