How often does a leap year occur?

Answer Answer for: how often does a leap year occur
Leap years almost always occur every four years, (i.e. in years that are divisible by 4). The only exceptions to this is that years that are evenly divisible by 100 are not leap years, unless they are also divisible by 400.
So this means that the years 1700, 1800, 1900, etc., were not leap years, but the year 2000 was, and the years 2400 and 2800 will be.
Q&A Related to "How often does a leap year occur?"
Leap years happen every four years. In that year, there are 366 years as opposed to 365. Also, February has 29 days instead of the regular 28 days. So if you were born on February
every 4 years.
Using the Gregorian calendar, which we use today, leap years occur a little less frequently than once every 4 years. Most years that are divisible by 4, like 2012, are leap years.
An equinox takes place twice a year, once in the spring and once in the fall. An equinox is a day where the hours of sunlight and hours of darkness are roughly equal, 12 hours each.
1 Additional Answer

The actual length of a year, defined by the amount of time it takes for the Earth to make a complete circle around the sun, is 365.24 days. The Gregorian calendar normally contains 365 days in a year. This is about a quarter of a day less than the actual number of days in a year, so an extra day is added to the calendar almost every four years to correct the situation.

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