aric/hijri-core
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hijri-core/CHANGELOG.md
Aric Camarata bb326d071c feat: initial release of hijri-core v1.0.0 
Zero-dependency Hijri calendar engine with pluggable calendar registry.
Built-in Umm al-Qura (UAQ) and FCNA/ISNA calendar engines. Supports N
additional calendars via registerCalendar(). Pure Date.UTC arithmetic,
binary search on 184-entry UAQ table, Meeus Ch.49 new moon formula for
FCNA. 39 ESM + 20 CJS tests passing. Dual CJS/ESM build with full TypeScript
declarations.
2026-02-25 14:06:02 -05:00

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Changelog

All notable changes to this project will be documented in this file.

The format follows Keep a Changelog.

[1.0.0] - 2026-02-25

Added

  • UAQ (Umm al-Qura) calendar engine with binary search over a 184-year reference table (1318-1500 H / 1900-2076 CE)
  • FCNA/ISNA calendar engine based on Jean Meeus Chapter 49 new moon algorithm with the FCNA conjunction criterion
  • Calendar registry (registerCalendar, getCalendar, listCalendars) for pluggable calendar support
  • toHijri(date, options?) convenience wrapper
  • toGregorian(hy, hm, hd, options?) convenience wrapper
  • isValidHijriDate(hy, hm, hd, options?) validation function
  • daysInHijriMonth(hy, hm, options?) month-length function
  • hDatesTable export of the full Umm al-Qura data
  • hmLong, hmMedium, hmShort Hijri month name arrays
  • hwLong, hwShort, hwNumeric Hijri weekday name arrays
  • Full TypeScript type declarations for all exports
  • Dual CJS and ESM build (tsup)
  • CalendarEngine interface for writing custom calendar implementations
  • Node 20/22/24 CI matrix
  • GitHub Wiki with API reference and architecture documentation