function yearsBetween yearsBetween(start: Date,end: Date,): number Calculates the years between two dates. The date must be equal or past for it to count as a full year. Examples Example 1 yearsBetween(new Date('2007-08-01', '2008-07-31')); // 0 yearsBetween(new Date('2007-08-01', '2008-08-01')); // 1 Parameters start: Date end: Date Return Type number