Does the date difference include the end date?

This calculator returns the calendar day difference between the two dates. It does not add an extra inclusive day automatically.

Can I subtract days from a date?

Yes. Switch the direction from add to subtract and enter the number of days you want to move backward.

Yes. The browser date functions automatically handle transitions across months and years.

Measure the distance between two dates or move forward and backward from a chosen day.

Start Date

End Date

Base Date

Direction

Number of Days

Does the date difference include the end date? No. This tool shows the raw calendar day difference between two dates.
Can I subtract days from a date? Yes. Choose the subtract option and enter how many days to move backward.
Will it handle month and year boundaries? Yes. Date changes across months and years are handled automatically.

Switch from calendar planning to converting time-adjacent units and speeds.

Measure change rates after working out calendar intervals.

Continue with general arithmetic once the dates are set.