Suleymaniye Foundation Calendar makes location-specific calculation of daily prayer times. Receives latitude, longitude, altitude, GMT and DST as input via GPS and outputs the prayer times of every location on Earth; from the Equator to the Poles.

Scientific and jurisprudential basis for calculations can be found on http://www.islamandquran.org and http://www.suleymaniyecalendar.com.
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Contact information for Suleymaniye Foundation:
Address: Suleymaniye, Sifahane Sok. No:20 34134 Fatih - Istanbul / TURKEY
Tel: 0090 212 513 00 93
Fax: 0090 212 511 21 69