Why prayer times differ by 5 minutes between two nearby mosques
Two Islamic apps in the same city can show prayer times that differ by 10-20 minutes. Two mosques in the same neighborhood can announce slightly different schedules. The differences aren't bugs — they reflect different traditional methods of calculating when each prayer's window begins.
For prayer times in any city with method selection, the Islamic prayer time page lets you switch between methods.
What's actually different between methods
Three main parameters vary:
1. Fajr angle. How far below the horizon the sun is when Fajr begins. Affects Fajr time.
2. Isha angle. How far below the horizon the sun is when Isha begins. Affects Isha time.
3. Asr juristic method. Whether Asr begins when shadow length equals object height (Standard) or twice the object height (Hanafi). Affects Asr time.
Combined, these create the differences you see between methods.
The major calculation methods
Each named method is a specific combination of these parameters:
Muslim World League (MWL)
- Fajr: 18°
- Isha: 17°
- Asr: Standard (Shafi'i)
- Used in: Many international communities; default in many apps
ISNA (Islamic Society of North America)
- Fajr: 15°
- Isha: 15°
- Asr: Standard
- Used in: North America
Egyptian General Authority of Survey
- Fajr: 19.5°
- Isha: 17.5°
- Asr: Standard
- Used in: Egypt, much of MENA
Umm al-Qura (Mecca)
- Fajr: 18.5°
- Isha: 90 min after Maghrib (or 120 min during Ramadan)
- Asr: Standard
- Used in: Saudi Arabia
University of Islamic Sciences, Karachi
- Fajr: 18°
- Isha: 18°
- Asr: Hanafi (in some configurations)
- Used in: Pakistan, parts of South Asia
Tehran (Iran)
- Fajr: 17.7°
- Isha: 14°
- Asr: Standard
- Used in: Iran (along with the Solar Hijri calendar)
Diyanet İşleri (Turkey)
- Fajr: variable (uses different criteria)
- Isha: variable
- Used in: Turkey
Jafari (Shia)
- Fajr: 16°
- Isha: 14°
- Used in: Shia communities, particularly in Iran
Asr juristic methods
The biggest visible difference is often Asr time:
Standard (Shafi'i, Maliki, Hanbali): Asr begins when an upright object's shadow equals its own height (plus the noon shadow). Asr is earlier in the day.
Hanafi: Asr begins when an upright object's shadow equals twice its own height (plus the noon shadow). Asr is later in the day, sometimes by 30-90 minutes.
A Hanafi mosque and a Shafi'i mosque in the same city will have noticeably different Asr times. This is the single most common reason for "the prayer times don't match."
Other contributing factors
Geographic precision. A mosque using a city-center reference point and an app using GPS coordinates 5 km away can have a 30-second difference. Usually too small to notice.
Sunrise/sunset definition. "Sunrise" can mean center of sun crossing horizon, top edge of sun appearing, or first photons reaching observer. Differences are 1-3 minutes.
Refraction adjustments. Atmospheric refraction bends light at low angles. Different methods apply slightly different corrections.
Iqamah delay. The mosque-published time for the actual prayer (iqamah) is usually 10-20 minutes after the calculated start time, allowing for community gathering. Apps usually show the calculated start; mosques show iqamah.
How to align with your mosque
If you want to match your local mosque exactly:
1. Find out which method your mosque uses. Ask the imam, check the mosque's website, or look at posted prayer times for clues.
2. Set your app to that method. The Islamic prayer time page lets you switch.
3. Check the Asr juristic method. If your mosque is Hanafi, switch the app to Hanafi.
4. Account for iqamah. Mosque-announced time = calculated start + 10-20 minutes typically. Apps show the calculated start.
After alignment, your app should match the mosque to within 1-2 minutes.
Why methods differ
Each method represents a specific tradition:
Geographic origin. Different methods originated in different parts of the Muslim world and reflect local astronomical conditions.
Historical scholars. Methods are named after the institutions or scholars who systematized them.
Modern adjustments. ISNA's 15° angles were specifically chosen for North American latitudes where 18° (MWL/Egyptian) was felt to push Fajr unreasonably early.
Community continuity. Once a community adopts a method, switching is unusual. The local convention persists.
When to use which method
There's no single "correct" method. Pick:
- The method your local mosque uses, for community alignment
- MWL if you don't have strong local guidance and want a "modern, neutral" choice
- ISNA if you're in North America and prefer slightly more conservative (later) Fajr/Isha times
- Karachi if you're in South Asia or follow Hanafi tradition
- Egyptian if you're in Egypt or prefer the older standard
- Umm al-Qura for Saudi Arabia or Hijaz region
Common confusions
"My phone is wrong." Usually it's not — it's just using a different method than your mosque. Switch the app's method to match.
"Two apps disagree." Different default methods. Check each app's settings.
"The mosque time doesn't match what I expected." Some mosques delay iqamah significantly; some announce only iqamah, not the calculated start. Apps show the calculated start.
"Asr time is way off." Almost certainly Hanafi vs Standard. Check.
"Isha is much later than my friend's app." Could be an angle difference, or the Umm al-Qura "fixed offset after Maghrib" approach.
High-latitude special cases
Above ~48°N latitude in summer, the sun doesn't drop 18° (or 17.5°, etc.) below the horizon. Strict Fajr/Isha calculations "don't happen." Methods address this with various rulings:
- Last reliable city: use the times from a city where calculation works
- Mecca times: use the times of Mecca on the same date
- 1/7 night fraction: calculate Isha as 1/7 of the night length from Maghrib
- Closest natural angle: use whatever angle the sun does reach
The Islamic prayer time page handles high-latitude cities with appropriate fallbacks.
FAQ
Why doesn't everyone just use one method?
Each method represents a centuries-old fiqh tradition. Switching requires changing the practice of millions of people, with no clear "right" answer. Coexistence is the practical solution.
Are the differences theologically significant?
For most Muslims, no. All recognized methods are considered valid within Islamic jurisprudence. Choosing a method is a matter of community preference, not doctrinal correctness.
Why do some apps show 6 different methods?
Because users come from different traditions. Apps designed for international audiences support multiple methods so each user can pick the one matching their tradition.
What if I'm traveling to a country that uses a different method?
Local convention usually wins. If you're in Saudi Arabia for Hajj, follow Umm al-Qura. If you're in Egypt during Ramadan, follow Egyptian. Returning home, switch back.
Should I memorize the calculations?
You don't need to. Apps handle them. Just pick the right method for your community.
Does the same method give the same time everywhere?
Yes — the method is geographic-position-aware. MWL applied to Mumbai gives Mumbai's Fajr; MWL applied to London gives London's Fajr. Same method, different positions, different times.
Bottom line
Prayer times can differ by 10-20 minutes between methods because of different sun-angle calculations and Asr juristic interpretations. None is "wrong" — each is a recognized tradition. To align with your local mosque, identify their method and set your app accordingly.
For prayer times with method selection, the Islamic prayer time page lets you switch between all major methods.