About this method
Useful for Iran-oriented prayer-time calculations.
Can differ from Umm al-Qura, ISNA, and Muslim World League.
Shown as a supported comparison method on city pages.
Iran
Institute of Geophysics, University of Tehran Prayer Time Method
A Tehran-based method with its own Fajr, Maghrib, and Isha parameters.
Try this method on city pages
When to use Institute of Geophysics, University of Tehran
Use Institute of Geophysics, University of Tehran when it matches your mosque, region, or community timetable. The best calculation method is not always the same worldwide because prayer-time conventions differ by country and organization.
Region context: Iran. If your local masjid publishes a timetable, use that as the final authority for iqamah, Jumuah, and Ramadan schedules.
Common causes of method differences
- Different Fajr twilight angle.
- Different Isha twilight angle or fixed interval.
- Different Asr rule: Standard or Hanafi.
- Local mosque adjustments and community practice.