Date Calculator.
Count days between dates, or add and subtract days.
The later date is excluded.
Enter dates and a number of days to see the result.
Count days and plan ahead
Choose two dates to find their difference, or add and subtract days from a starting date. Answers update immediately, without signing in.
- Calendar day differences, including reversed dates
- Add or subtract days with optional weekend skipping
- Local today defaults and copyable results
Common questions
How are days between dates counted?
By default the earlier date is included and the later date is excluded: Monday to Tuesday is one day. Include both dates counts both calendar dates, making that two days. Reversed dates produce a negative difference.
Does weekdays only exclude holidays?
It skips Saturday and Sunday, but includes public holidays. When adding or subtracting days, the starting date is not counted. Adding zero days keeps the same date, even on a weekend.
Do daylight saving changes affect the result?
No. This calculator counts calendar dates, not elapsed 24-hour intervals. For exact instants and time zones, use Timestamp Converter.
What date range is supported?
Years 1 to 9999, with up to 1,000,000 whole days added or subtracted when the result stays in range. Leap years follow Gregorian calendar rules.
Are my dates saved?
No. Calculations stay in your browser and reset when you leave or refresh. Initial dates use today on your device.