Leap Year

A leap year is a year that includes a February 29th, making it a total of 366 days. In the Gregorian calendar, a leap year adds an additional day to February, ending with the 29th rather than 28th on normal years. Leap Years occur every 4 years once, usually occuring on a year where the last digit is even (0, 2, 4, 6, or 8).

The current year 2018 is not a leap year for three reasons:
 * 1) February ends on the 28th and not the 29th.
 * 2) It is not divisible by 4.

The previous leap year was 2016, the next leap year is on 2020.

Century Leap Years
A century leap year is any leap year ending with "00" and is divisible by 400. For example, the years 1700, 1800, 1900, and 2100 are not century leap years because they are not divisible by 400. The years 1600 and 2000 are leap years however, and the next century leap year will occur in 2400.