Date Difference Calculator (Business/Calendar Days)

Calculate business days and weekdays between dates

Choose the starting date for your calculation

Choose the ending date for your calculation

Need to add N business days from a start date? Try the Workday Calculator · Calendar days only? Use Days Between · Add/Subtract units? Use Date Add/Subtract

Exclusion Options

Common Scenarios

Practical ways to use business-day and calendar-day differences.

Business days between dates
  • Exclude weekends
  • Optionally exclude public holidays
Calendar-day span
  • Simple day gaps
  • Inclusive vs exclusive options
Compliance timelines
  • Weekday-only SLAs
  • Bank holiday considerations
Best Practices
  • Clarify inclusive/exclusive boundaries before calculating
  • Normalize time zone at 00:00 to avoid DST issues
  • Use country holiday calendars for accurate business days
Regional Notes
  • Observed holidays may shift to Monday
  • Regional variations exist within the same country

Terminology

  • Business/working days exclude weekends and may exclude public holidays.
  • Calendar days include all days; banking days can exclude bank holidays.

Frequently Asked Questions