The ancient Egyptian calendar was a solar calendar with a 365-day year. The year consisted of three seasons of 120 days each, plus an intercalary month of 5 epagomenal days treated as outside of the year proper. Each season was divided into four months of 30 days. These twelve months were initially numbered within each season but came to also be known by the names of their principal festivals. Each month was divided into three 10-day periods known as decans or decades. It has been suggested that during the Nineteenth Dynasty and the Twentieth Dynasty the last two days of each decan were usually treated as a kind of weekend for the royal craftsmen, with royal artisans free from work.
> The number of teeth (30).
> When I said it represents the rays of the sun, I
> was partially correct.
> Let me give your the symbolism for the number 30:
> Carries the influence of three. A path whence
> astrologers deduce their judgements, as it is the
> number of days required for the sun's transit
> through one zodiac sign and for a manifestation of
> the phases
> of the moon.
> eg. The Parthenon in Athens, honours the dawn
> goddess, as it had 30 pillars in one direction.
> So what we have is a calendar.