Date Difference Calculator
Count the days, weeks and months between any two dates.
Choose two valid dates to see the difference.
About Date Difference Calculator
Counting days between dates by hand means dealing with month lengths and leap years, and off-by-one errors are almost guaranteed once a month boundary is involved.
This calculator reports the gap in years, months and days together, and separately as a total number of days, weeks, hours and minutes - plus a mode for adding a duration to a date.
Frequently asked questions
Is the end date included?
By default the difference is exclusive of the end date. There is a toggle to count both endpoints inclusively.
Does it account for daylight saving?
Whole-day differences are computed on calendar dates, so a clock change never adds or removes a day.
Can I add or subtract a duration instead?
Yes, the second mode adds or subtracts days, weeks, months or years from a starting date.