This type of year is also known as a bissextile year
[PAR] Feb 29, 2016 ... A leap year (also known as an intercalary year or a bissextile year) is a ... in each 
year drift over time with respect to the event that the year is... [DOC] [TLE] Leap Year, 2016 [PAR] Feb 24, 2016 ... To make up for the lost time, Leap Years were born.