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Date Calculator
Add or subtract days and find the interval between two dates.
About the Date Calculator
The Date Calculator has two modes: add or subtract a number of days from a date, or count the days between two dates.
Everything runs in your browser with JavaScript. Nothing you type is uploaded to our server, so it is safe to use with private data.
How to use it
- Choose the mode.
- Pick the start date.
- Enter the number of days (negative to go back), or pick an end date.
- Select Calculate.
Common uses
- Finding a deadline 30, 60 or 90 days from today.
- Counting the days until a trip or an event.
- Working out notice periods and return windows.
Tips
- The count is in calendar days, including weekends and holidays.
- Check whether your deadline counts the start day itself, since rules differ.