Where does leap year take place?

According to the Julian calendar, every year that is evenly divisible by four is a leap year.

There are two exceptions to this rule.

1. Years divisible by 100 are not leap years.

2. Years divisible by 400 ARE leap years.

So 2000, 2004 and 2008 were leap years, and 2012 and 2016 will be. However, 2100 will not be, even though 2000 was a leap year.