For this reason, it is forbidden for him to fast on that day, in imitation of the takbeer of the ihram, and to match the intention of fasting in the event that fasting is obligatory, so in breaking his fast he is obligatory, just as his fasting in Ramadan was obligatory, so everything he does is permissible on that day, such as the Sunnahs of prayer in prayer and all that he does is obligatory. On that day, the obligatory duties of all acts of worship are in the same position as the pillars of prayer.