Date Difference Calculator

The gap between two dates is reported here in both of the forms people actually need: a total number of days, and a breakdown into years, months and days. The total is what payroll, interest and notice calculations run on, while the breakdown is how the same span gets described in conversation, and having both prevents the mental arithmetic that usually introduces the error. Typical uses are working out a tenure, the length of a project, the time until a deadline, or how long ago something happened. One convention needs deciding by you rather than by the tool: whether the end date itself counts is a matter of agreement, and contracts and notice periods differ on it, so check which basis your situation uses. Day counts that cross a leap year include the extra day, which is why two seemingly equal spans can differ by one.