Medical Relationship between the White Days and Fasting during them. Abu Thar, the venerable Companion, may Allah be pleased with him, said: “Allah’s Messenger, (pbuh), bade us to fast ‘the Three White Days’ of each month, namely the 13th, 14th, and 15th (of the lunar month).” [Narrated by An-Nasa’i (2739)] In fact, I quote the above Prophetic Hadith in order to show the medical relationship between it and a well-known scientific fact, namely that there is a relationship between man’s movements and activities in life and movement of the Moon round the Earth. A research studied police files