Noun
the name of the day that is added during a leap year
Source: WordNetAccording to Dio Cassius, a leap day was inserted in 41 BC to ensure that the first market day of 40 BC did not fall on 1 January, which implies that the old 8-day cycle was not immediately affected by the Julian reform. Source: Internet
A leap day is observed because the Earth’s period of orbital revolution around the Sun takes approximately six hours longer than 365 whole days. Source: Internet
A leap day is added in various solar calendars (calendars based on the Earth's rotation around the Sun ), including the Gregorian calendar standard in most of the world. Source: Internet
As of March 1 ( O.S. February 17 ), when the Julian calendar acknowledged a leap day and the Gregorian calendar did not, the Julian calendar fell one day further behind, bringing the difference to 13 days. Source: Internet
As of March 1 ( O.S. February 19 ), when the Julian calendar acknowledged a leap day and the Gregorian calendar did not, the Julian calendar fell one day further behind, bringing the difference to 11 days. Source: Internet
Each Gregorian year has either 365 or 366 days (the leap day being inserted as 29 February), amounting to an average Gregorian year of 365.2425 days (compared to a solar year of 365.2422 days). Source: Internet