Date Calculator: Add or Subtract Days
Add or subtract any number of days, weeks, months or years from a date.
Result
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Questions
- How do I add days to a date?
- Choose the start date, pick Add, and type the number of days. The new date and its weekday appear immediately. You can mix years, months, weeks and days in one go.
- What happens when I add a month to January 31?
- There is no February 31, so the result moves to the last day of February (28th, or 29th in a leap year). This is the same rule banks and most calendar apps use.
- In what order are the units applied?
- Years and months are applied first, then weeks and days. Adding 1 month and 1 day to January 31 gives March 1 in a non-leap year.
- Can I count business days instead?
- Yes. Use the business days calculator to add working days while skipping weekends and US federal holidays.