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leap year
- In the Gregorian calendar, a year lasting 366 days rather than 365, with February 29 (leap day) added as the extra day; this occurs in years whose last two digits are evenly divisible by 4; e.g., 1996.
- A year with an extra day in any other calendar.
Related categories
• CELESTIAL MECHANICS
• UNITS
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Encyclopedia of Alternative Energy & Sustainable Living
Encyclopedia of History
Transport Concepts & Designs (partner site)