The origin of the 7 day week is interesting. It seems to be that most of the ancient peoples used a 7 day week. There is little explanation so presumably they were told to do so.
Eight is the divine symbol of vitality. It is the symbol of the mystic marriage and of spiritual and physical regeneration. It is the great current without an end passing up and down through man as a golden band of light which is symbolized by the wedding ring. Eight is the strange symbol inscribed by Nature upon the puffed head of the Indian cobra, the symbol of the Logos, and the symbol of the universal creative power. All things in the universe are said to have come into being as a result of the twisting or spinning power of the figure 8.
Our birth is but a sleep and a forgetting…trailing clouds of glory do we come from God, who is our home -Wordsworth
FIVE is the hand of the philosopher. It is made up on the four elements plus spirit, which – like the coordination between the human thumb and the fingers – co-operates with the four elements but is not with them for it works by opposition. FIVE is called the Christ, and in the Tarot it is the hierophant or priest, because it is the spirit of man rising from the tomb of matter. Those who have lived through the laws of the four and have mastered themselves have become the Five – ie liberated from the casket of matter. The geometric form of this condition is the pyramid, in which one corner rises from the four corners of the base. When the four elements have become the pedestal upon which the spirit stands as a city upon a hill and not with stone walls which close it is, then man has reached the spiritual number of the Five.
and behold....this is the real meaning behind the Pentagram!
“What is the ‘philosopher’s stone’?”
“It is very simple. The ‘philosopher’s stone’ is produced when you, in the process of working on yourself, grind ‘in mortar’ your lower self, while all the Higher Knowledge, which you receive, you test by experience and accept as your own. Then it becomes Higher Wisdom and a strong base — that ‘philosopher’s stone’ on which one can construct the entire building of Divine Beingness.”
“What is the ‘alchemical gold’?”
“It is the adept’s consciousness that has to turn into the Highest Gold with the help of the ‘philosopher’s stone’: the developed and subtle consciousness has to shine with goldish Light, similar to the light of the morning sun. Then such a consciousness can infuse into the Great Central ‘Sun’ — into the Creator of the entire universe, merge with Him and attain the Immortality, Bliss, Calm, and full Freedom!”
“Will You tell us about Your higher methods of work with consciousness?”
“It is not necessary. You know now that the higher Initiations are given by Divine Teachers only to those ready for this. And all preparatory stages are described clearly and fully in your books and films. We are all glad looking at the fruits of Our common work! The only pity is that so few people can understand and appreciate it now…”
Age is sure helping the process though 
