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51e07a65b3
Temporal Calendar Protocol implementation for Hijri calendar via hijri-core. Provides HijriCalendar base class, UaqCalendar (UAQ engine), FcnaCalendar (FCNA engine), and convenience singletons uaqCalendar/fcnaCalendar. Calendar protocol: year, month, monthCode, day, daysInMonth, daysInYear, monthsInYear, inLeapYear, dayOfWeek, dayOfYear, weekOfYear, daysInWeek, dateFromFields, yearMonthFromFields, monthDayFromFields, dateAdd, dateUntil, mergeFields. dateAdd applies year/month increments in Hijri coordinate space (correct semantics for variable-length lunar months), then applies days/weeks in ISO space. Day-of-month clamped on month boundary changes. 18 ESM + 8 CJS tests passing. Dual CJS/ESM build.
22 lines
862 B
TypeScript
22 lines
862 B
TypeScript
import { getCalendar } from 'hijri-core';
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import { HijriCalendar } from './HijriCalendar';
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/**
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* Temporal calendar implementation for the FCNA/ISNA calendar.
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*
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* The Fiqh Council of North America (FCNA) calendar, also used by the Islamic
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* Society of North America (ISNA), determines month starts through astronomical
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* calculation: a new month begins the day after the conjunction (new moon) if
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* that conjunction occurs before 12:00 noon UTC, or two days after if at or
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* after noon. This criterion enables global date-setting without local moon
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* sighting, making it popular for diaspora Muslim communities in North America
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* and Europe.
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*
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* Calendar engine: hijri-core FCNA (Meeus Chapter 49 calculations).
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* Calendar ID: "hijri-fcna"
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*/
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export class FcnaCalendar extends HijriCalendar {
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constructor() {
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super(getCalendar('fcna'));
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}
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}
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