How it works
Enter a start date and an end date and the calculator instantly works out the difference between them in days, weeks, months and years. It's useful for planning projects, checking notice periods, working out someone's exact age in days, or just settling an argument about how long ago something happened.
The calculation counts full calendar days between the two dates. Months and years shown are approximate averages (30.44 and 365.25 days), since calendar months don't all have the same length.