Ruling 1632 — Fasting (Ṣawm)

Someone who wants to fast for two consecutive months for the kaffārah of a fast of the month of Ramadan must not start at a time when he knows a day on which fasting is unlawful – such as Eid al-Aḍḥā[182] – will fall within the one month and one day period, nor must he fast at a time when he knows a day on which fasting is obligatory (such as a day of the month of Ramadan) will fall within that period.