How Date Difference Calculator works

Find calendar years, months and days between two dates, plus total days, weekdays and weekends.

The formula

Calendar difference advances whole years, then whole months, then remaining days. Total days use exact civil-date boundaries.

A practical example

28 February to 1 March spans two elapsed days in a leap year and one elapsed day otherwise.

Important limitations

Weekday counts do not exclude public holidays. Reversed inputs are supported and clearly labelled.

Frequently asked questions

Is the end date included?

It is excluded by default. Turn on Include end date to count it.

Are public holidays excluded?

No. Only Saturdays and Sundays are identified.