okhp3-tradition-observance-calendar

Topics in the source

• okhp3-tradition-observance-calendar
• Execution contract
• Bundled reference files
• 1. Scope Rules
• 2. Unified Event Type
• 3. Emoji Registry
• 4. Jewish Holidays -- Hebcal REST API
• 4.1 Endpoint

OverKill Hill P³ · overkillhill.com · github.com/OKHP3 Fetch, compute, and format religious observance calendars for the Abrahamic Reference Engine. Covers Judaism (Hebcal API), Christianity (Computus algorithm -- Western and Orthodox), and Islam (AlAdhan API). All sources are free and anonymous. No API key. No cost. Zero runtime dependencies beyond fetch. Accept a target year and optional tradition or denomination filter. Validate the year before constructing provider URLs or date objects. Normalize every source into ObservanceEvent and retain the source, attribution, and caveat fields. Computed dates, provider dates, and missing dates must remain distinguishable. Use Promise.allSettled for independent provider or month requests so one outage does not discard successful results. Surface partial failure in the UI or return metadata rather than hiding it. Do not replace the deterministic Christian Computus path with a paid, credentialed, or unverified holiday API. Run the bundled Easter validator after algorithm changes. Treat Islamic dates as calendar estimates. State the local moon-sighting caveat, and never present an estimated date as universally authoritative. Fetch Wikipedia d

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