“But to the three hundred and sixty days given in the calendars of lucky and unlucky days must be added the five epagomenal days which were considered to be of great importance and had each its peculiar name.
On the first Osiris was born, on the second Heru-ur (Aroueris), on the third Set, on the fourth Isis, and on the fifth Nephthys; the first, third, and fifth of these days were unlucky, and no work of any kind was to be undertaken on them.
The rubric which refers to these days (See Chabas, op. cit., p. 104) states that whosoever knoweth their names shall never suffer from thirst, that he shall never be smitten down by disease, and that the goddess Sekhet (the Eye of Sekhet seems to have taken the form of noxious vapours in the fields at sunrise; see Chabas, op. cit., p. 78) shall never take possession of him; it also directs that figures of the five gods mentioned above shall be drawn with unguent and ânti scent upon a piece of fine linen, evidently to serve as an amulet.
From the life of Alexander the Great by Pseudo-Callisthenes (I. 4) we learn that the Egyptians were skilled in the art of casting nativities, and that knowing the exact moment of the birth of a man they proceeded to construct his horoscope.
Nectanebus employed for the purpose a tablet made of gold and silver and acacia wood, to which were fitted three belts. Upon the outer belt was Zeus with the thirty-six decani surrounding him; upon the second the twelve signs of the Zodiac were represented; and upon the third the sun and moon (quote from my History of Alexander the Great, Cambridge, 1889, p. 5).
He set the tablet upon a tripod, and then emptied out of a small box upon it models of the seven stars (i.e., Sun, Moon, Zeus, Kronos, Aphrodite, and Hermes; we must add Mars according to Meusel’s Greek text) that were in the belts, and put into the middle belt eight precious stones; these he arranged in the places wherein he supposed the planets which they represented would be at the time of the birth of Olympias, and then told her fortune from them.”
E.A. Wallis Budge, Egyptian Magic, London, 1901. Pp. 228-9.