Business Days & Holidays API

Public holidays and business-day arithmetic for 246 countries. Other APIs give you a list of dates. This one answers the question you actually asked.

Try it

• Will a Dec 23rd order ship within 5 business days?

  GET /v1/add?date=2026-12-23&days=5&country=US

• How many business days between two dates?

  GET /v1/diff?from=2026-12-23&to=2027-01-06&country=DE

• Is the 4th of July a working day in California?

  GET /v1/date?date=2026-07-04&country=US&subdivision=CA

• Is the Tel Aviv office open right now?

  GET /v1/status?country=IL&opens=09:00&closes=18:00

• Every holiday in Japan this year

  GET /v1/holidays?country=JP

Why not just use a holiday list?

Because the list is the easy half. Weekends are not Saturday–Sunday everywhere — Israel, Saudi Arabia and Egypt run Friday–Saturday — and a regional holiday in Bavaria is not a holiday in Berlin. Get either wrong and you quote a delivery date that is off by days.

Reference

• Full specification

  GET /openapi.json

• Supported countries and subdivisions

  GET /v1/countries

• Service health and dataset version

  GET /health