Most modern prayer apps ask you for your location and instantly spit out the prayer times. But sometimes, you'll notice Asr might be an hour late, or Fajr seems incredibly early compared to your local mosque.
Believe it or not, this isn't a glitch—it's a matter of calculation.
The Math Behind the Adhan
Historically, prayer times were determined by looking at the sun. Fajr begins at true dawn, Dhuhr when the sun passes its zenith, Asr when the shadow of an object equals its length, and so on.
Because we rely on digital clocks today, Islamic scholars and astronomical organizations around the world developed mathematical formulas to calculate these exact solar phases. The catch? Different regions use different criteria for these calculations.
For example, the Muslim World League calculation method uses 18 degrees for Fajr and 17 degrees for Isha, which works beautifully in parts of Europe and the Middle East. Meanwhile, the ISNA (Islamic Society of North America) method uses 15 degrees, specifically tailored for Muslims living in the US and Canada.
How to tune NourAthan for your City
If your app isn't matching up with your local community, you just need to switch your Calculation Method. We made this process completely painless.
Just hop into your NourAthan settings and check the Calculation section:
Instead of drowning you in overly complex astronomical settings, NourAthan automatically curates the most reliable, recognized authorities globally, including:
- Muslim World League (MWL): Standard for Europe, Far East, parts of US.
- ISNA: Standard for North America.
- Egyptian General Authority of Survey: Used in Africa, Syria, Iraq, Lebanon.
- Umm Al-Qura University (Makkah): Standard in Saudi Arabia and the Arabian Peninsula.
- Karachi (University of Islamic Sciences): Standard in Pakistan, Bangladesh, India, Afghanistan, parts of Europe.
Pro Tip: The Asr Rule (Hanafi vs Shafi'i)
If you notice everything is perfectly aligned with your mosque except for Asr—which seems delayed by an hour—you're likely running into the Asr calculation rule.
By default, the majority of the Islamic world (Shafi'i, Maliki, Hanbali) dictates Asr begins when an object's shadow equals its length. However, the Hanafi school dictates it begins when the shadow is twice its length.
If your local mosque follows the Hanafi method, simply go into your NourAthan settings and toggle the Asr calculation from Standard to Hanafi. Boom. Perfectly synced.
Take a quick look at your settings today, and make sure your digital Adhan perfectly mirrors your local community!