Summary
Leap years exist for a more important reason than making people born on Feb. 29 feel young.
It is an effort to keep order in our seasons and basic survival issues such as planting. The duration of the solar year is slightly less than 365.25 days, so those people who devised calendars throughout time have had to come up with ways of keeping months from drifting irregularly.See the full content of this document
Extract
Leap Year Explained
The Hindu, Hebrew, Chinese and Islamic calendars all do that in various ways, as does the Gregorian calendar, the one used most widely. That calendar, of course, does that by adding the existence of a Feb. 29 once every four years, thus keeping the vernal equinox on or near March 21.
The vernal equinox is when the sun is directly above the equator. The time between two vernal equinoxes is the exact definition of a year.There are other rul...See the full content of this document
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