7 dates, from a live API. Where a fixed-date holiday falls on a weekend the observed date is what matters for business-day math — that is the case hardcoded lists get wrong.
| Date | Holiday |
|---|---|
| 2026-01-01 | New Year's Day |
| 2026-03-17 | St Patrick's Day |
| 2026-04-03 | Good Friday |
| 2026-04-06 | Easter Monday |
| 2026-05-04 | May Day |
| 2026-12-25 | Christmas Day |
| 2026-12-28 | St Stephen's Day |
curl "https://bizcal-api.jmgorombey1.workers.dev/add?jurisdiction=IE&date=2026-12-24&days=3"The response carries a skipped[] array naming every excluded day and why — weekend or holiday. That is the part worth having: a bare date cannot be checked by anyone later, and a reason array can.
The calendars, the observed-date rules and the settlement math are the whole product. It also ships as a one-time $49 self-host kit — full source, tests, and a one-command deploy to your own Cloudflare Worker. The hosted API is free either way.