Definition that contains leap year
- leap day the name of the day that is added during a leap year
- dhu al-hijjah the twelfth month of the Islamic calendar and the season of the hajj; has one extra day in leap years
- gregorian calendar the solar calendar now in general use, introduced by Gregory XIII in 1582 to correct an error in the Julian calendar by suppressing 10 days, making Oct 5 be called Oct 15, and providing that only centenary years divisible by 400 should be leap years; it was adopted by Great Britain and the American colonies in 1752
- bissextile day the name of the day that is added during a leap year
- new style calendar the solar calendar now in general use, introduced by Gregory XIII in 1582 to correct an error in the Julian calendar by suppressing 10 days, making Oct 5 be called Oct 15, and providing that only centenary years divisible by 400 should be leap years; it was adopted by Great Britain and the American colonies in 1752
- dhu'l-hijja the twelfth month of the Islamic calendar and the season of the hajj; has one extra day in leap years
- hebrew calendar (Judaism) the calendar used by the Jews; dates from 3761 BC (the assumed date of the Creation of the world); a lunar year of 354 days is adjusted to the solar year by periodic leap years
- common year a year that is not a leap year
- dhu'l-hijjah the twelfth month of the Islamic calendar and the season of the hajj; has one extra day in leap years
- jewish calendar (Judaism) the calendar used by the Jews; dates from 3761 BC (the assumed date of the Creation of the world); a lunar year of 354 days is adjusted to the solar year by periodic leap years