Date Add/Subtract Calculator (Days, Weeks, Months, Years)

Add or subtract days, weeks, months, and years from any date with business day calculations.

Use positive numbers to add time, negative numbers to subtract time

Need business‑day addition/subtraction? Use the Workday Calculator · Days between dates? Use Date Difference

Planning Options

Common Scenarios

Practical ways to add/subtract time with correct rules.

Add/subtract days
  • Positive adds, negative subtracts
  • Optionally skip weekends/holidays
Add months/years
  • End-of-month behavior
  • Leap-year aware
Plan deadlines
  • Business-day results
  • Copy/share targets
Best Practices
  • Confirm end-of-month handling when adding months
  • Account for leap years and DST boundaries
  • Use business-day mode for work schedules
Regional Notes
  • Observed holidays may affect business-day results
  • Bank holidays differ across regions

Terminology

  • Adding/subtracting calendar units uses all calendar days.
  • Business‑day add/subtract excludes weekends and may exclude public holidays.

Frequently Asked Questions