Calculate Years Between Two Dates Years calculator between two dates This Years Calculator calculates the number of years between two dates. Start date: Month JanFebMarAprMayJunJulAugSepOctNovDec Day 12345678910111213141516171819202122232425262728293031 End date: Month JanFebMarAprMayJunJulAugSepOctNovDec Day 12345678910111213141516171819202122232425262728293031 Include end date See also: Count the number of months from a date