Business Days Calculator

Pick two dates and the calculator counts the business days between them, both dates included — the same rule as NETWORKDAYS. From 31 March to 14 April 2026 that is 11. Add a holiday calendar and weekday holidays drop out as well: 24 December 2026 to 4 January 2027 gives 6 on the US calendar.

A business day survives two filters: it has to be a weekday, and it must not be a holiday in the calendar that governs the work. This page applies both to a span and returns one number, counting the first and the last day — the same convention as NETWORKDAYS in a spreadsheet. From 31 March to 14 April 2026 that leaves 11 of 15 calendar days; the four that fall away are the two weekends. Add the US federal calendar to the span from 24 December 2026 to 4 January 2027 and two more drop out, Christmas Day and New Year's Day, both of them Fridays: 12 calendar days become 6 business days. Only holidays on a weekday matter. Boxing Day 2026 is a Saturday, so the German calendar deducts nothing for it — the day was already outside the count. The reverse case is the US observation rule, where a fixed holiday on a Saturday moves to the Friday before and does cost a business day. Two limits are worth knowing before you rely on the number. The German option is the nationwide set of nine holidays, so anything specific to a single state has to be subtracted by hand. And the page knows nothing about time zones or cut-off times: it works in whole calendar dates, so a document that arrives after a local deadline may need a later start date than the one you entered.