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Is it a business day? Get the official answer

The holidays and business days API for the US and Puerto Rico

OpenDay is the holidays and business days API for the US and Puerto Rico: every holiday, from the official sources. It answers “is it a business day?” and “what date is N business days from now?”, with the law cited on every date.

Get the APISee the docs
  • 50 states + DC
  • Puerto Rico: 3 calendars
  • Federal Reserve bank days
  • English & Español
  • Source on every date
GET /v1/is-business-day?date=2027-07-05&region=PR

{
  "data": {
    "date": "2027-07-05",
    "region": "PR",
    "calendar": "government",
    "isBusinessDay": false,
    "reason": "holiday",
    "holidays": [
      {
        "id": "independence-day",
        "nameEs": "Día de la Independencia de los Estados Unidos",
        "observedDate": "2027-07-05"
      }
    ]
  }
}

Is it a business day in Puerto Rico?

No

US Independence Day (observed)

53regions
1,360dates in 2026–2027
3Puerto Rico calendars
78municipios
Use cases

The right date, where it matters

Payroll, payments, deliveries and legal deadlines all depend on knowing which days are business days.

A person reviewing tax and payroll forms with a calculator

Payroll dates

Move a payday that falls on a holiday to the right business day, with each state's calendar or Puerto Rico's government calendar.

Example: US Independence Day 2027 is a Sunday; in Puerto Rico it is observed on .

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ACH settlement

Bank transfers follow the Federal Reserve calendar, where a Saturday holiday is not moved to Friday.

Example: is a federal day off (Independence Day), but a banking business day.

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Delivery estimates

“Arrives in 10 business days” from any start date, skipping weekends and holidays.

Example: 10 business days after is on the federal calendar and on the banking calendar.

Two people shaking hands over a desk with a signed contract

Legal deadlines

“Within 10 business days” for a state or for Puerto Rico, counting only the days its offices are open.

Example: June 2027 has 22 business days for Texas state offices.

Coverage

Every US and Puerto Rico calendar

RegionCalendarsYears in the APIVerification
US federal (US)11 federal holidays (5 U.S.C. 6103)2000–21002026 official, 2027 official
US banking (calendar=banking)Federal Reserve holiday schedule2000–2100computed from the Federal Reserve rules
50 states + DC (US-TX, …)State-employee holidays; banking2026–21002026: 35 official, 16 computed. 2027: 16 official, 26 computed, 9 projected
Puerto Rico (PR)Government, legal and banking2000–2100Government: 2026 computed, 2027 official
Puerto Rico toolkit78 municipios, ZIP code to municipio, IVU tax ratesCurrentofficial (Census 2020; PR tax code)

Look up the dates: federal holidays 2027 · bank holidays 2027 · Puerto Rico holidays 2027 · all states

Why OpenDay

Dates you can trust

Every date cites its law

With a link to the official source and its source type.

Puerto Rico done right

Three calendars (legal, government, banking) and the Sunday-to-Monday rule.

All 50 states + DC

Each state's own state-employee calendar and weekend rule.

Bank days, not just holidays

Federal Reserve rules: a Saturday holiday is not moved for banks.

Bilingual

Every holiday has English and Spanish names.

Honest data

Every year is labeled official, computed or projected.

Colorful colonial buildings on a street in Old San Juan, Puerto Rico
Puerto Rico

Puerto Rico, done right

  • Government, legal and banking calendars in one API.
  • The Sunday-to-Monday rule of Código Político Art. 387.
  • Checked against the annual OATRH holiday memo.
  • Spanish names, plus 78 municipios, ZIP lookup and IVU rates.
Puerto Rico holidays 2027En español
Example

One call, an answer with its source

Every response is { data, meta }. Each holiday carries its actual date, the observed day off, English and Spanish names, the law and a link. meta tells you the calendar and whether the year is official, computed or projected.

All endpoints
GET /v1/holidays?country=PR&year=2027

{
  "data": [
    {
      "id": "three-kings-day",
      "date": "2027-01-06",
      "observedDate": "2027-01-06",
      "nameEn": "Three Kings' Day (Epiphany)",
      "nameEs": "Día de Reyes",
      "type": "legal",
      "source": "Ley 26-2017, Art. 2.05, as amended by Ley 8-2021 and Ley 117-2022; OATRH Memorando Especial 12-2026 (July 17, 2026)",
      "sourceUrl": "https://docs.pr.gov/files/OATRH/Contenido%20Nuevo/Memos/ME%2012-2026..pdf",
      "sourceType": "official"
    },
    {
      "id": "independence-day",
      "date": "2027-07-04",
      "observedDate": "2027-07-05",
      "nameEn": "US Independence Day",
      "nameEs": "Día de la Independencia de los Estados Unidos",
      "type": "legal",
      "source": "Ley 26-2017, Art. 2.05, as amended by Ley 8-2021 and Ley 117-2022; OATRH Memorando Especial 12-2026 (July 17, 2026)",
      "sourceUrl": "https://docs.pr.gov/files/OATRH/Contenido%20Nuevo/Memos/ME%2012-2026..pdf",
      "sourceType": "official"
    }
  ],
  "meta": {
    "calendar": "government",
    "verificationStatus": "official",
    "note": "Confirm official proclamations."
  }
}
Pricing

Pay per successful request

Pay per successful request — see current pricing on Apify. Errors, health checks and documentation requests are never charged.

See pricing on Apify
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FAQ

Frequently asked questions

What is OpenDay API?

A REST API for US and Puerto Rico holidays and business days: federal, all 50 states + DC, Federal Reserve bank days, and the legal, government and banking calendars of Puerto Rico. It also does business-day math.

Where do the dates come from?

From the law and official calendars. Every date cites its source with a link and carries a label: official, computed or projected. News sites are never used as a source.

Does it handle the Puerto Rico Sunday-to-Monday rule?

Yes. A Sunday holiday is observed the following Monday and a Saturday holiday is not moved, per Código Político Art. 387. The government calendar is checked against the annual OATRH memo.

Is a Saturday holiday a bank holiday?

No. Federal offices close the Friday before, but the Federal Reserve does not move Saturday holidays, so banks are open that Friday. Use the banking calendar for ACH and payments.

How do I get access?

The API is on Apify. Create an Apify account, open OpenDay API and call it as an HTTP API (Standby mode) or send up to 1,000 requests in one run.

Is there a bank holidays or ACH calendar API?

Yes. The banking calendar follows the Federal Reserve holiday schedule, which ACH and wire settlement use, including its rule that Saturday holidays are not moved to Friday.

Can the API count business days between two dates?

Yes. business-days/between counts the business days between two dates and business-days/add adds or subtracts business days, on any US, state or Puerto Rico calendar.

How much does it cost?

You pay per successful request; errors are never charged. See the current pricing on Apify.

Can I use these lookup pages in my app?

The pages are for people looking up a date. For software, bulk use or automation, use the API.