Date calculator
Choose days between two dates, or add a number of days, weeks or months to a start date. A negative amount subtracts.
- Between, or add
- Free, no sign-up
Free to use, no account. More everyday tools
How to use it
- Pick between or add.
- Enter the start date.
- Enter the end date, or the amount and the unit.
How months are added
Adding months moves the month and keeps the day number. If that day does not exist, the result is the last day of the target month. Weeks are seven days. The day count between two dates does not include the start day.
The weekday of an added date is shown with the result, using UTC dates so a timezone does not shift the day.
Private by design
Privacy
The dates stay in this tab and are not uploaded.
Questions
Does “between” include both days?
No. From the 1st to the 25th is 24 days, the number of midnights between them.
Can I subtract?
Yes. In add mode, use a negative amount.
Are time zones involved?
No. The inputs are calendar dates.