A vow to fast on Mondays and Thursdays if they coincide with the festival
Machine translationRead the Arabic original
Question:
He says: Honorable Shaykh, may Allah grant you success, if one vows to fast every Monday and Thursday, and the day of the festival falls on a Monday or a Thursday, what does he do? And does he make them up afterwards?
Answer:
He does not fast; because this is a day on which breaking the fast is obligatory, so it is not permissible, and it does not fall under the vow. This is what falls under the vow, such as the days of menstruation do not fall under the vow, nor the days of post-natal bleeding. Yes.
He says: Honorable Shaykh, may Allah grant you success, if one vows to fast every Monday and Thursday, and the day of the festival falls on a Monday or a Thursday, what does he do? And does he make them up afterwards?
Answer:
He does not fast; because this is a day on which breaking the fast is obligatory, so it is not permissible, and it does not fall under the vow. This is what falls under the vow, such as the days of menstruation do not fall under the vow, nor the days of post-natal bleeding. Yes.
Source
الفوزان -أشرطة- شرح زاد المستقنع مع الأسئلة - ٠٣٧-كتاب الصيام - ٣ - ٢٨-٢-٢٢ هـ — archive.org (25:08)
The Arabic text is a machine transcription of the audio recording.