Is the fast of one who drank forgetfully after the intention to fast from the previous day valid?
Intention (Niyyah) is a condition for the validity of fasting, whether it is obligatory or supererogatory. Fasting is not valid without it. Since you did not intend to fast on Monday, neither at night nor during the day, your fast is not valid.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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