Dates

Add or Subtract Days Calculator

Date calculator to add or subtract calendar days from a starting date and display the resulting weekday.

Find a date a specific number of calendar days before or after a starting date. Enter a positive number to add days or a negative number to subtract them.

Calendar days include weekends and holidays. For weekday-only calculations, use the Business Days Calculator.

Frequently asked questions

Are weekends included?

Yes. This tool adds or subtracts calendar days.

Can I subtract days?

Yes. Enter a negative number such as −30.

Why use noon UTC internally?

It avoids many date shifts caused by local daylight-saving transitions when working with date-only values.