What is the astronomical time (in hours) that represents the onset of the yellowing (of the sun's rays) until the end of the optional time for the Asr prayer, knowing that this time varies with the seasons?
The exact time of isfirar (the sky's yellowing before sunset) cannot be precisely determined by fixed astronomical hours because it varies between summer and winter. However, it can be perceived visually.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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