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Days Between Dates Calculator

Count calendar days, full weeks and working days between two dates, with US federal holidays removed if you want.

How to count the days between two dates

  1. Enter a start date and an end date. They can be in either order.
  2. Tick count both start and end date if you need an inclusive count, such as the number of days in a hotel booking including check-out.
  3. Leave skip US federal holidays ticked to get federal business days. Untick it to count every Monday to Friday.
  4. Press Calculate to see calendar days, full weeks, business days and the holidays that were skipped.

Worked examples

PeriodElapsed days
January 1 to December 31, 2026364
September 11, 2001 to September 11, 20269,131
October 22 to Christmas Day, 202664

Calendar days, weekdays and business days

Calendar days count every day, weekends included. Weekdays count Monday to Friday. Business days here means weekdays that are not federal holidays, using the observed date when a holiday falls on a weekend. For example, when July 4 lands on a Saturday, federal offices close on Friday, July 3, and that Friday is skipped.

Banks follow the Federal Reserve holiday schedule, which is close to the federal list but handles Saturday holidays differently. Read how to count business days for payroll, shipping and deadline examples.

Related calendars and guides

Open any year calendar from 1995 to 2027 to see the date in context with US federal holidays, observances, moon phases and the events of that year. The calendar guides explain the rules behind every result.

Questions

Days Between Dates Calculator FAQ

Does the count include the start date and end date?

By default it counts elapsed days: the start date is not counted and the end date is. From Monday to Wednesday is 2 days. Tick "count both start and end date" if you need an inclusive count, which adds one day.

Which holidays are skipped for business days?

When you tick the holiday option, the calculator skips the 11 US federal holidays on the weekday they are observed, from 1990 to 2035. It does not skip state holidays, Inauguration Day or company closures.

How many business days are in a year?

A US year has 260 to 262 weekdays. After the federal holidays are removed, every year from 1990 to 2035 has between 249 and 252 federal business days, most often 250 or 251. Each year calendar shows the exact figure.

Can I use this for a legal or contract deadline?

Use it as a quick cross-check only. Courts, agencies and contracts define deadlines differently, for example whether the first day counts or what happens when the last day is a weekend. Always confirm with the rule that governs your deadline.

Does daylight saving time change the result?

No. The calculator counts whole calendar days, so the 23-hour and 25-hour days around clock changes still count as one day each.