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API · /hebcal-api

Jewish Calendar API

healthy 4,457 Subscribers

The Jewish calendar as an API — powered by Hebcal. Convert any date between the Gregorian and Hebrew calendars (with the formatted Hebrew date and the Jewish events falling on that day), list the Jewish holidays of any year — major and minor festivals, Rosh Chodesh and special Shabbatot — each with its English and Hebrew name, date and category, and get this week's Shabbat candle-lighting time, Torah portion (parashah) and Havdalah time for any location by GeoNames id or coordinates. From Rosh Hashanah and Yom Kippur to Passover, Shavuot and Hanukkah, with Hebrew dates rendered in Hebrew script, it is ideal for calendar, scheduling, event, religious and cultural applications. A Jewish-calendar resource — distinct from secular public-holiday and Islamic prayer-time APIs. Open data from Hebcal (CC-BY 4.0 / GPL).

#jewish-calendar #hebrew #holidays #calendar #shabbat #culture
api.oanor.com/hebcal-api
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Machine-readable spec so AI agents can integrate this API.

/api/hebcal-api/openapi.json
/api/hebcal-api/llms.txt

Discovery: GET /api/index.json lists every API.

Jewish Calendar API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
199 ms
Server probes · 24h
Subscribers
4,457
active
Total calls
76
last 7 days
status Full status page → · 12 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 2,900 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 2,900 calls/month
  • 2 req/sec
  • Convert + holidays + Shabbat
  • No credit card
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Starter

€7.45 /month

  • 57,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 57k calls/month
  • 8 req/sec
  • Hebrew <-> Gregorian both ways
  • Email support
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Pro

€23.30 /month

  • 265,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 265k calls/month
  • 20 req/sec
  • Calendar & scheduling apps
  • Priority support
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Mega

€60.80 /month

  • 930,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 930k calls/month
  • 50 req/sec
  • Calendar platform
  • Dedicated SLA
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Related APIs

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Gematria API — oanor API marketplace

Gematria API

Gematria and isopsephy as an API, computed locally and deterministically — turning words into the numeric sums of their letters. The hebrew endpoint computes Hebrew gematria: the standard value (Mispar Hechrachi) that adds the base value of each letter (alef 1, bet 2 … tav 400), the gadol value that counts the five final letters as 500–900, and the reduced digital root; for example שלום (shalom) is 376. The greek endpoint computes Greek isopsephy with the Milesian numeral system (alpha 1 … omega 800, plus the archaic stigma 6, koppa 90 and sampi 900), case-insensitively; for example λογος (logos) is 373. The english endpoint computes English gematria three ways — the ordinal or simple value (a 1 … z 26), the Pythagorean value that reduces each letter to a single digit 1–9, and the Sumerian value (ordinal × 6) — with the digital root; for example HELLO is 52 ordinal. Non-letter characters are ignored and unrecognised letters are listed. Everything is computed locally and deterministically, so it is instant and private. Ideal for word-game, puzzle, esoteric, study and language app developers, name-numerology and text-analysis tools, and Bible and classics study. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is letter-value gematria; for Roman numerals use a Roman-numeral API and for general number bases a base-conversion API.

api.oanor.com/gematria-api

 Public Holidays API — oanor API marketplace

Public Holidays API

Public holidays for 120+ countries — by year, the next upcoming holidays for a country, and the list of supported countries. Each holiday includes the date, English and local name, scope (national/regional) and type. Ideal for HR, scheduling and booking systems.

api.oanor.com/holidays-api

 Stock Index Seasonality API — oanor API marketplace

Stock Index Seasonality API

The calendar patterns equity traders position around — "Sell in May", the Santa Claus rally, the September swoon — computed live from ~10 years of Yahoo Finance monthly data across the world's major stock indices (no key, nothing stored). Equities have well-documented seasonal tendencies, and this measures them directly: for each index it takes a decade of monthly returns, groups them by calendar month, and returns the average return in each of the twelve months, the share of years that month was positive (the win rate), and the historically strongest and weakest months. The seasonality endpoint returns one index's full 12-month seasonal profile plus the current month's historical bias. The month endpoint flips it around: for a calendar month it ranks every index by its historical average return, so you can see which markets are seasonally strong or weak right now. The indices endpoint lists what is covered, from the S&P 500, Nasdaq, Dow and Russell to the DAX, FTSE, CAC, Euro Stoxx, Nikkei and Hang Seng. The equity-index seasonality / calendar-pattern cut — distinct from the FX, commodity and crypto seasonality APIs, the index price feed and the constituent APIs.

api.oanor.com/indexseasonality-api

 Commodity Seasonality API — oanor API marketplace

Commodity Seasonality API

The calendar patterns commodity traders position around, computed live from ~10 years of Yahoo Finance monthly futures data (no key, nothing stored). Commodities are the most seasonal market there is: natural gas tends to rally into winter heating demand, gasoline into the summer driving season, grains around the planting and harvest calendar. This measures it directly — for each commodity it takes a decade of monthly returns, groups them by calendar month, and returns the average return in each of the twelve months, the share of years that month was positive (the win rate), and the historically strongest and weakest months. The seasonality endpoint returns one commodity's full 12-month seasonal profile plus the current month's historical bias. The month endpoint flips it around: for a given calendar month it ranks every commodity by its historical average return, so you can see what is seasonally bullish or bearish right now. The commodities endpoint lists what is covered. The commodity-seasonality / calendar-pattern cut — distinct from the FX-seasonality API (currencies), the commodity-price feed, the commodity-spreads and the commodity-momentum APIs. It answers what a commodity usually does this month, not what it costs today.

api.oanor.com/commodityseasonality-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Jewish Calendar API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Jewish Calendar API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Jewish Calendar API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Jewish Calendar API cost?
Jewish Calendar API has a free tier with 100 calls / month. Paid plans start at €7.45 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Jewish Calendar API GDPR-compliant?
All requests to Jewish Calendar API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/hebcal-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/hebcal-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/hebcal-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/hebcal-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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