Made for PaperOpen studio
Business day calculator

Deadlines without the date math.

Add or subtract working days, or count the working days between two dates. Weekends and observed U.S. federal holidays are excluded. Everything runs in this browser tab.

ResultFriday, January 29, 2027

10 business days after the start date. The start date itself is not counted; weekends and observed U.S. federal holidays are skipped.

Business days by year and month

Every month has a page with its exact working-day count, the dates themselves, and the holidays removed from the total.

How the two modes count

Add or subtract starts from your date, excludes it, and steps one calendar day at a time, decrementing only when it lands on a business day. A negative number walks backwards using the same rule.

Count between walks from the start date to the end date and includes both endpoints when they qualify. If the end date precedes the start date, the count runs backwards and is reported as an absolute number of days.

Which holidays are excluded

The calculator excludes the eleven U.S. federal holidays, using observed dates rather than actual dates — because the observed date is the one on which offices are actually closed. New Year’s Day 2027 falls on a Friday, so it is observed that same day; Christmas Day 2027 falls on a Saturday, so it is observed on Friday, December 24. The complete list for any year is on that year’s calendar page, and the derivation rules are on the methodology page.

Common questions

What counts as a business day?
A business day is Monday through Friday, excluding observed U.S. federal holidays. When a fixed-date holiday falls on a Saturday, the preceding Friday is observed; when it falls on a Sunday, the following Monday is observed.
Is the start date included when adding business days?
No. Adding business days excludes the start date and moves forward one civil day at a time, counting only qualifying business days. Adding one business day to a Friday returns the following Monday.
Are both endpoints included when counting between two dates?
Yes. Counting between two dates includes the start date and the end date whenever each one is itself a business day. If you need an exclusive count, subtract the endpoints that qualify.
Does this calculator handle state or bank holidays?
No. It uses the U.S. federal holiday schedule only. State holidays, bank holidays, religious observances, and company closures vary and are not included.
Can I use this for legal or court deadlines?
No. Results are planning estimates. Court rules, filing deadlines, payroll calendars, and contracts each define business days their own way, and many count calendar days instead. Always confirm against the governing rule.

Related tools

Planning around a specific month? Open a monthly calendar to see the working days laid out, or print a weekly planner to schedule the work itself.