Prayertimes
Birka Prayer TimesDocumentation
Quick Instruction
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Times displayed
Location * Settings
1. Defintions * Taqdir
2. Shuruq and Maghrib
3. Fajr and Isha (twilight)
4. Persistent twilight
5. Taqdir Implementation
6. Criticism of some tables
Summary * Notes
Observations
Light pollution
Model for refraktion
Sky and Earth
2
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