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VALUE: Leap Years |
If the requested date is in either January or
February, you have to check whether the year is a leap year.
If it is a leap year and the date is in January or
February, subtract 1 from your final answer.
How do you determine whether it is a leap year?
If a year is divisible by four, it is a leap year. In such a
year, the month of February will have one extra day; the
29th.
Examples:
1972 - 72 is divisible by 4, thus it is a leap year.
1789 - 89 is not divisible by 4, so it is not a leap year.
It follows that every fourth year is a leap year, but there
is an exception to this rule: At the turn of each century a
leap year is skipped, except if the century is divisible by
400 (Gregorian Calendar reforms).
Examples:
1700 is not divisible by 400, so that year was not a leap
year. 2000 is, so it was a leap year.
It follows that only in every four hundred years will the
turn of the century be a leap year.
Examples: 400, 800, 1200, 1600, 2000, 2400, etc.
[1896 was a leap year, 1900 was skipped, so eight years
passed before the arrival of the next leap year, which was
1904.] |
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