Returns the length of the year represented by this date. !(p) This returns the length of the year _in days, either 365 or 366.
@return 366 if the year is leap, 365 otherwise
See Implementation
Returns the length of the year represented by this date. !(p) This returns the length of the year _in days, either 365 or 366.
@return 366 if the year is leap, 365 otherwise