Date Calculator

Add or subtract time from a date, or calculate business days between dates.

How to use

  • Choose Add / Subtract to find a date a specific number of years, months, weeks, or days from a starting date.
  • Choose Business Days to add or subtract working days (Mon–Fri), with optional US federal holiday exclusion.
  • Select + Add or − Subtract to control the direction of calculation.
  • Click Calculate Date to see the resulting date and day of the week.
  • Use the Today button to quickly set the start date to today.