To correct the mismatch of the Julian calendar, the Gregorian calendar introduced a new rule: a year is considered a leap year only if it is divisible by 4, except if it ends in “00″, in which ...

This is why 1700, 1800 and 1900 were not leap years, but 2000 was. Despite its accuracy, the Gregorian calendar is not flawless. Instead of being off by one day every 128 years like the Julian ...

Prior to the Gregorian and even Julian calendars ... emperor adopted a 365-day calendar and added 10 days the calendar, including a leap day in February every four years, calendar.com said.

The annual calendar with its 12 months and additional days in leap years is a gift from the Catholic Church, while the astronomical Julian calendar is a product of the scientific revolution.

4 Leap years were introduced by the Roman emperor Julius Caesar, who created a new calendar to take the extra quarter-days into account. The Julian calendar took effect in 45 BC. 5 The maths ...