Business days calculator

Uses real holiday calendars and per-country weekends — the same data the Chronos API serves. Not a “skip Saturdays and Sundays” toy.

Country / region Calculation Start date Business days to add (negative to go back)

Limited to a handful of free calculations per day. Building something? A free API key gives you 500 requests a day, and the API is one curl call.

What makes this hard

Weekends are not universal: much of the Middle East rests Friday–Saturday, Nepal only Saturday. Holidays move: when Christmas lands on a weekend, the UK observes substitute days that exist in no fixed-date table. Markets close when offices don't: NYSE shuts for Good Friday while most US businesses work. Correct business-day math needs a maintained calendar, not an algorithm.