Fajr and Isha Calculation Methods
Why Fajr and Isha can differ between calculation methods and countries.
Fajr and Isha depend on twilight, so calculation methods use different angles to define when each time enters. A different angle or local adjustment can shift the timetable by several minutes.
Some countries use Muslim World League, Umm al-Qura, Egyptian settings, or local official settings. Showing the method on each city page helps explain the difference.
Why These Two Times Differ More
Fajr before sunrise and Isha after Maghrib are tied to twilight brightness, so method differences are more visible than for Maghrib or Dhuhr.
When comparing two timetables, check city, timezone, and method before treating the difference as an error.
Sources and Methodology
These links explain the general source or method behind the page. They do not turn the page into a personal ruling, and local calendars or authorities still take precedence when they differ.
- NOAA Solar Calculation Details - General solar-position and sunrise/sunset calculation reference.
- U.S. Naval Observatory Solar Coordinates - Approximate solar-coordinate method used in astronomical calculations.
- PrayTimes Calculation Notes - Practical reference for Fajr/Isha angles and common prayer-time methods.
- World Salah Times methodology and accuracy limits - Internal explanation of calculated times and their limits.