Days Calculator (Counter) Calculate the number of days between two dates Use this days calculator to count the number of days between two dates. Start date: Month JanFebMarAprMayJunJulAugSepOctNovDec Day 12345678910111213141516171819202122232425262728293031 End date: Month JanFebMarAprMayJunJulAugSepOctNovDec Day 12345678910111213141516171819202122232425262728293031 Include end date See also: Calculate Days From a DateCalculate the number of months from a date