Islamic prayer times for Dart and Flutter. Pure Dart port of pray-calc, implementing the MCW seasonal model and dynamic twilight angles. Uses nrel_spa for the NREL Solar Position Algorithm.

dependencies:
  pray_calc_dart: ^1.0.0

import 'package:pray_calc_dart/pray_calc_dart.dart';

void main() {
  final date = DateTime(2024, 3, 15);
  final times = getTimes(date, 40.7128, -74.0060, -5.0);

  print('Fajr:    ${formatTime(times.fajr)}');
  print('Sunrise: ${formatTime(times.sunrise)}');
  print('Dhuhr:   ${formatTime(times.dhuhr)}');
  print('Asr:     ${formatTime(times.asr)}');
  print('Maghrib: ${formatTime(times.maghrib)}');
  print('Isha:    ${formatTime(times.isha)}');
  print('Qiyam:   ${formatTime(times.qiyam)}');
}

Full API documentation, guides, and examples are in the wiki.

Fixed-angle methods (ISNA 15 degrees, MWL 18 degrees) produce inaccurate Fajr times at latitudes above 45 degrees N/S. The dynamic method adapts the depression angle based on season, latitude, Earth-Sun distance, and local atmospheric conditions.

Result: approximately 18 degrees at the equator, approximately 12-14 degrees at 50-55 degrees N in summer. Matches observational data from the Moonsighting Committee Worldwide.

Dart SDK 3.7.0+. Works in Flutter (iOS, Android, Web, Desktop), Dart CLI, and server-side Dart. Single dependency: nrel_spa.

• pray-calc - TypeScript/JavaScript version (npm)
• nrel-spa - Standalone NREL SPA for JavaScript
• qibla - Qibla direction calculator

The Solar Position Algorithm is based on:

Reda, I. and Andreas, A. (2004). Solar Position Algorithm for Solar Radiation Applications. NREL/TP-560-34302. DOI: 10.2172/15003974

The MCW seasonal model is based on the work of the Moonsighting Committee Worldwide (Khalid Shaukat).

MIT. The NREL SPA implementation carries its own terms (see LICENSE for details).