Is it permissible to fast voluntarily on Friday?
It is disliked to single out Friday for fasting unless one fasts a day before it or a day after it, or if one's fasting coincides with a habit, such as fasting the White Days, or the Day of Arafah, or making up for Ramadan, or fulfilling a vow.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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