## hijri-core **[Home](Home)** **Reference** - [API Reference](API-Reference) - [Architecture](Architecture) - [Benchmarks](benchmarks/index) **API** - [toHijri](api/toHijri) - [toGregorian](api/toGregorian) - [isValidHijriDate](api/isValidHijriDate) - [daysInHijriMonth](api/daysInHijriMonth) - [registerCalendar](api/registerCalendar) - [getCalendar](api/getCalendar) - [listCalendars](api/listCalendars) - [hDatesTable](api/hDatesTable) - [hmLong / hmMedium / hmShort](api/hmLong) - [hwLong / hwShort / hwNumeric](api/hwLong) **Guides** - [Quick Start](guides/quickstart) - [Advanced Usage](guides/advanced) **Examples** - [Gregorian to Hijri](examples/gregorian-to-hijri) - [Ramadan Calendar](examples/ramadan-calendar) **Contributing** - [Contributing](CONTRIBUTING) - [Code of Conduct](CODE_OF_CONDUCT) - [Security](SECURITY) **Links** - [npm](https://www.npmjs.com/package/hijri-core) - [GitHub](https://github.com/acamarata/hijri-core) - [Changelog](https://github.com/acamarata/hijri-core/blob/main/CHANGELOG.md)