Frequently Asked Questions - Search for standards

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To determine Isha and Fajr calculations, one needs to calculate the time when the sun is at a certain distance below the horizon. The twilight angle is used for this purpose and it is defined as the angle in degrees of the sun below the horizon, when total darkness begins or ends.
Some organisations use a fixed time after Maghrib to determine the start of Isha time The following standards exist for determining Fajr and Isha times:
Egyptian General Authority of Survey:
Region Africa, Syria, Iraq, Lebanon, Malaysia, parts of the USA
Fajr – twilight angle 19.5
Isha – twilight angle 17.5
Islamic Society of North America (ISNA):
Region Parts of the USA, Canada, parts of the UK
Fajr – twilight angle 15
Isha – twilight angle 15
Islamic Organisations Union of France:
Region France
Fajr – twilight angle 12, 15 or 18
Isha – twilight angle 12, 15 or 18
Majlis Ugama Islam Singapura:
Region Singapore
Fajr – twilight angle 20
Isha – twilight angle 18
Muslim world league:
Region Europe, Far East, parts of the USA
Fajr – twilight angle 18
Isha – twilight angle 17
Umm Al Qura:
Region The Arabian Peninsula
Fajr – twilight angle 18.5
Isha – twilight angle 90 minutes after Maghrib (120 minutes during Ramadan)
University of Islamic sciences, Karachi:
Region Pakistan, Bangladesh, India, Afghanistan, parts of Europe
Fajr – twilight angle 18
Isha – twilight angle 18
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