Q&A: Different prayer times for the same city

Category: Faith & Spirituality, Featured Topics: Prayers (Salah) Views: 47382

Join Dr. Aslam Abdullah for a Q&A in IslamiCity Forum


Salam Dr. Aslam,

Ramadan is getting closer. Prayer time is getting more important, specially the fajr time (imsak time, end of sahur).

My questions is, many times we found prayer time for isha and fajr for the same city are different (about 20 minutes) from one source to the other. Why it's happen? And which one that we have to choose and why?.



Assalaamu Alaykum,

Thank you very much for raising a very pertinent and important question.

The difference in Fajr and Isha timings in our masajid in the same city comes from using different criteria. Some use 15 degrees of the sun’s depression and others use 18 or even 20 degrees of sun’s depression. In some places people use 75 or 90 minutes criteria. Both methods have their validity among scholars and you can choose based on your preference

The Quran and the Sunnah did not prescribe any degrees of the sun’s depression as the Quran said eat and drink until the white thread of dawn appears to you distinct from its black thread, then complete your fast till the night appears.(2:187)

The Sunnah guides the believers to offer Isha at the disappearance of shafaq. Scholars have differences on the meaning of the term and these differences are the main reason for adopting different methods to determine prayer timings for Fajr and Isha.

Those who follow 15 degree of sun depression method follow nautical twilight where the horizon is closer to sea level because its visibility is not possible to determine a latitude with reference to the horizon.

Those who follow 18 degree criteria follow astronomical twilight where there is no light and it is dark with no perception of twilight.

However, NASA defines astronomical twilight. “Before the beginning of astronomical twilight in the morning and after the end of astronomical twilight in the evening the sun does not contribute to sky illumination; for a considerable interval after the beginning of morning twilight and before the end of evening twilight, sky illumination is so faint that it is practically imperceptible”

We can conclude on the basis of above discussion the following

Subh Sadiq (Fajr-al-Mustatir) when morning light in the sky starts spreading horizontally

When the top of the sun's disk just appears above the horizon.

When the sun begins to decline after reaching its highest point (Zenith) in the sky. 5 minutes after Zenith.

When the length of any object's shadow reaches a factor of the length of the object plus the length of that object's shadow at Noon.

Theoretical time as given in newspapers when the top of the sun's disk just disappears below the horizon.

For Sunni's, it is 3 minutes after theoretical sunset; for Shi'aas it is 17 minutes after theoretical sunset.

Following are help notes from IslamiCity Prayer times Application:


Calculation Methods allow you to apply a convention on which angle to use for calculating the Fajr & Isha time and shadow factor for Asr time. Unless overwritten, the default Fajr & Isha calculation method for North America (United States & Canada) is Fiqh Council. For the rest of the world, the default is Muslim World League.

The angles (in degrees) used for Fajr & Isha are as follows:

- Muslim World League - 18, 17;
- Fiqh Council - 15, 15;
- Egyptian General Authority - 19.5, 17.5;
- Umm al_Qura - 18.5, 90min;
- University of Islamic Sciences - 18, 18;
- Institute of Geophysics - 17.7, 14;
- Leva Research Institute - 16,14.

For Asr, the Common method (Shafii, Hanbali, Maliki & Jafari) is based on shadow factor of 1 and Hanafi as 2. Unless overwritten, the default Asr calculation is the Common method.

Please note that the time (Imsak) to stop eating Sahur (for fasting) is a few minutes before Fajr.

You can change the calculation method to override the defaults by visiting the settings page (click on the gear icon at top-right corner).

  Category: Faith & Spirituality, Featured
  Topics: Prayers (Salah)
Views: 47382

Related Suggestions

The opinions expressed herein, through this post or comments, contain positions and viewpoints that are not necessarily those of IslamiCity. These are offered as a means for IslamiCity to stimulate dialogue and discussion in our continuing mission of being an educational organization. The IslamiCity site may occasionally contain copyrighted material the use of which may not always have been specifically authorized by the copyright owner. IslamiCity is making such material available in its effort to advance understanding of humanitarian, education, democracy, and social justice issues, etc. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law.

In accordance with Title 17 U.S.C. Section 107, and such (and all) material on this site is distributed without profit to those who have expressed a prior interest in receiving the included information for research and educational purposes.

Older Comments:
18. Holy Quran is word of Allah عزوجل. Muslims recite it, understand it and act upon its orders. It is obligatory upon all the Muslims of the world to recite some verses of Holy Quran in the salah. Reciting Holy Quran in the salah and performing salah at specific salah time is a great virtue in Islam.

KZM said:
Salaam. Say you are keeping fasts at 1.30AM every day but your Mosque starts extra prayers so it makes it difficult for you to keep fasts at 1.30AM is it okay to change the time say to 1.45 for the remainder of the prayers? Jazak Allah

SANA said:
Salah called namāz (Persian: نَماز ) in some languages, is one of the Five Pillars in the faith of Islam and an obligatory religious duty for every Muslim.