How Islamic prayer times are calculated

Five daily prayers are tied to the sun’s position at your coordinates, not to a single worldwide clock. Software (including this site) solves those positions for a civil date and timezone, then labels the results Fajr, sunrise, Dhuhr, Asr, Maghrib, and Isha.

Each prayer

• Fajr — when the sun is a chosen number of degrees below the horizon (often 18° or 15°).
• Sunrise — sun’s upper limb on the horizon (not a prayer, but it ends Fajr time).
• Dhuhr — just after solar noon, when the sun has passed the meridian.
• Asr — when an object’s shadow equals its length (Shafi and others) or twice that (Hanafi), plus the noon shadow.
• Maghrib — sunset.
• Isha — sun a chosen number of degrees below the horizon after sunset, or a fixed interval after Maghrib (Umm al-Qura in some seasons).

Why apps disagree

Different Fajr/Isha angles, Asr madhhab, high-latitude rules (summer nights near the poles), and a mosque’s extra offset all move the clock. This site prints the method on every city page and does not claim government certification.

Implementation: adhan-js. See also the methods list.