Business Days Calculator

Counting only the working days between two dates means stripping out weekends and holidays, and that is exactly what this tool does, skipping Saturdays, Sundays, and a predefined list of estimated federal holidays for 2026. For project planning, contract deadlines, and finance work where weekends simply do not count, that distinction is the whole point. Picture a project that kicks off on January 5th, 2026, with a 10 business day window: pinpointing where that deadline truly lands is the difference between hitting it and missing it.

The engine behind it walks the calendar one day at a time. Beginning at the Start Date, it advances day by day and tests each date against two filters: whether it falls on a Saturday or Sunday, and whether it appears in the 2026 estimated federal holiday list (New Year's Day, Martin Luther King, Jr. Day, Presidents' Day, Memorial Day, Juneteenth, Independence Day, Labor Day, Columbus Day, Veterans Day, Thanksgiving Day, Christmas Day). A date counts as a business day only when it clears both checks.

One caveat worth internalizing: observed holidays shift with region and company policy, so reconcile the built-in list against your own calendar rather than assuming they match. Treating every holiday as automatically excluded without confirming what this calculator actually counts is a reliable way to land on the wrong deadline. Time zones deserve attention too, particularly when your start and end dates sit in different parts of the world.