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As publicly known, there is no such thing as three-month’s fasting; however, it is recorded in the sources of hadith that in the month of Rajab and Sha’ban, the Prophet used to perform supererogatory fast more than any other months. (Bukhari, Fasting, 52,53; Muslim, Fasting, 175, 179). Ramadan fast, though is obligatory. Apart from these, he is known to have performed supererogatory fasting on Mondays and Thursdays and on the 13th, 14th and 15th days of each month in the lunar calendar. (Tirmidhi, Fasting, 44; Abu Dawud, 68). Nevertheless, there is no record in hadith books about his fasting without a delay on these particular months.