THE FAST OF DOUBTFUL DAYS
 
    The Prophet's Companions had different opinions as to the fast of doubtful days. Some of them permitted it, whilst is others forbade it. The opinion of the opposite has more weight because of a verdict pronounced by Abu Ammar to the effect that "whoever fasts a doubtful day would, in fact be disobeying the Prophet."

    However, a man is permitted to fast, a doubtful day. should such a day fall within the number of days which a man has been actually fasting. The Prophet's instruction in this connection is : "No man shall fast one or two days before Ramadan, unless he was already observing a fast".

    It is the custom of the Muslims to look: for the crescent moon on the evening of 29th of Sha'ban. If it does not appear, the following day is considered a doubtful day being neither the end of Sha'ban nor the beginning of Ramadan. The Muslims are not allowed to fast on such a day.