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Business days you can check

The Finance Calendar API tells you whether a market, a currency or a country is open on a given day, and puts the official source behind every date it has verified.

Why it exists

A payment that lands on a day its currency doesn't settle, or a trade booked for a day its exchange is shut, costs a day, and sometimes a fee or a failed instruction. Most of these mistakes come from the calendar, not the code: a list of public holidays that doesn't know the Federal Reserve is open on the Friday before a Saturday holiday, that London closes at 12:30 on Christmas Eve, or that a government added an extra holiday a few weeks ago.

Public-holiday lists are easy to find. Calendars for exchanges and settlement systems, kept up to date and traceable to the authority that publishes them, are not. So we built one API that covers all three: exchanges, settlement currencies and countries, each date marked with how it was established, and one request that checks several markets at once.

The data

How the data is made

  1. 01

    The library

    Every calendar starts from the open-source holidays library (version 0.106 in this release), which encodes the holiday rules of every country and many markets.

  2. 02

    Official sources

    Each year is checked against the authority's own publication: exchange notices, central bank settlement calendars, government gazettes. A year that matches is marked verified and cites its sources; corrections are recorded with the source that justifies them.

  3. 03

    Rules for settlement

    Settlement and bond calendars are built from their base calendars with the operator's published rules, such as the Federal Reserve staying open on the Friday before a Saturday holiday.

Keeping it right

Archived, watched, reviewed

What it will and won't tell you

  • Verified dates cite their source; library dates don't yet. A date marked "library" comes from the holidays library and hasn't been checked against an official source by us.
  • It follows announcements, a little behind. Holidays and early closes are sometimes added at short notice. We check the sources daily, and a person reviews each change before it's published.
  • It tells you whether a day is open, not the whole timetable. It knows closures and early closes with their closing time, not every trading session or cut-off.
  • It's data, not advice. Before a date decides a payment or a trade, confirm it against the official source the API cites for it.

That's why our terms ask you not to treat any single date as the only basis for a transaction.

Built in Australia

The Finance Calendar API is built and run on the Sunshine Coast, Queensland. Prices are in US dollars, the currency most API buyers work in; customers in Australia get tax invoices with GST shown. Support comes from the people who build it, through the contact form.

Who runs it

The Finance Calendar API is operated by Search Ventures Pty Ltd (ACN 639 906 353) as trustee for the Ahlgren Trust. Search Ventures also makes these APIs:

Insolvency Alerts

ASIC insolvency notices, watched against the companies you deal with, with email alerts, signed webhooks and a REST API.

AUO

The Australian business data API: ABR, ASIC, ACNC and more, joined into one REST API with provenance on every field.

Exchange Rates API

Official Reserve Bank of Australia exchange rates as a REST API.

This release

Release 20261016T064343Z, generated 2026-10-16: 1,652calendars and 1,144,886 dates.