The earth takes approximately a quarter day more than 365 days to go around the sun.
Leap years were first implemented in the Gregorian calendar in 1582.
No, odd-numbered years are never leap years in either the Gregorian calendar or the Julian calendar.
Here they are:180418081812181618201824182818321836184018441848185218561860186418681872187618801884188818921896
Julius Caesar introduced leap years when he reformed the Roman calendar in 46 BCE. His calendar, which is called the Julian calendar, was in use for almost 20 centuries. Beginning in 1582, it was eventually replaced by the Gregorian calendar, which is almost identical to the Julian calendar but is more accurate because it has fewer leap years.
Here they are:2000200420082012201620202024202820322036204020442048205220562060206420682072207620802084208820922096Here they are: 2000200420082012201620202024202820322036204020442048205220562060206420682072207620802084208820922096
2012 is a leap year. Leap years fall once every four years to keep our calendar years in sync with the seasons.
In the Gregorian calendar, No Only century years divisible by 400 are leap years.
every 4 years....2012 will be the next leap year.
The Julian calendar has more leap years. Every 400-year period of the Julian calendar is three days longer than the same period in the Gregorian calendar.
In 46 BC with the creation of the Julian calendar.
The 2000 calendar will repeat in 2028. This was a leap year and leap year calendars generally repeat every 28 years.
The Julian calendar introduced by Julius Caesar had 365 days per year and 366 EVERY 4 years. This had allowed the calendar to creep out of line with the seasons. The Gregorian calendar we use now has the leap year rule: Every year that is exactly divisible by four is a leap year, except for years that are exactly divisible by 100; the centurial years that are exactly divisible by 400 are still leap years. For example, the year 1900 was not a leap year; the year 2000 was a leap year.