Deadlines, delivery dates and notice periods are often in business days.
Business days calculator
Pick the start and end dates and whether to count each end.
Which holidays
US federal holidays as set by 5 U.S.C. 6103, on the dates federal offices observe them: a holiday on a Saturday is observed the Friday before, and on a Sunday the Monday after. That matches the schedule OPM publishes each year.
US federal holidays
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Sources
Sources last checked 1 November 2026.
Frequently asked questions
How many business days are in a year?
About 250: 260 or 261 weekdays less about 10 or 11 federal holidays that fall on weekdays.
Are Saturdays business days?
Not usually, and not in this calculator.
Does it include state holidays?
No, only US federal holidays.