Find exactly how much time lies between two dates in years, months, weeks and days, count working days, or add and subtract days from a date to find a deadline.
How to use the Date Difference Calculator
- Pick a start date and an end date.
- Choose whether to include the end date and whether to count only business days.
- Or switch to Add/Subtract mode to calculate a date in the future or past.
How the difference is calculated
Total days are counted using calendar dates in UTC, so daylight-saving changes never cause off-by-one errors. Business days exclude Saturdays and Sundays (public holidays vary by country and are not excluded).
Frequently asked questions
Does it account for leap years?
Yes. All calendar rules, including leap years, are handled.
Should I include the end date?
Include it when counting durations like a hotel stay's calendar days or an event that covers both dates.