Date Calculator
Measure date differences and add or subtract days.
Loading interactive controls…
Frequently asked questions
Are the week and month figures exact?
Only the day count is exact. Weeks divide the days by 7, months by 30.44, and years by 365.25, so those three are averages and will not line up with actual calendar months.
Do time zones or daylight saving shift the answer?
No. Both dates are read as UTC midnight, so the gap is always a whole number of days and the add-days field lands on the same calendar date everywhere.