You'll hear this is because there are 13 Moons a year, but that is not really precise as the Lunar and Solar calendars don't agree annually (it takes 19 years for them to align). There are about 12.3 Lunations (Synodic Moon Cycle of 29.5 days between repeated Moon Phase) per year during which Moon orbits Earth (Sidereal Lunar Cycle of 27.3 days) about 13.4 times as She averages a 13-Degree daily advance through the Zodiacal Stars and Signs. I've recently read articles stating the Full Moon often falls on or around the 13th of the month. That's just altogether wrong. It was true this month as the Full Moon aligned during the wee hours of the 12th, but last year the January Full Moon was on the 23rd and next year we'll have two on the 1st and the 31st.
Now, how many annual Seasons are there when we honor the Equinoxes and Solstices for the turns?... Four (1+3), each with 13 weeks just as there are 13 cards in each of the 4 suits... did you know you'd find a Solar Calendar in the deck of 52? Ooh, and speaking of cards, what about the mystical set where we find the Goddess' 13 marks the image called "Death"? Well, I'm told by a pro that in the oldest Tarot, the 13 was nameless just as "Fool" was numberless (the cards are older than zero, you know?).
It would seem, Moon is not the only Goddess scorned by this Friday the 13th spell. Can't we hear Venus yell??? But there's more... 13 and the Pentagram are only symbols of Her dance with Earth. Is Gaia herself under attack? Do we really have to ask? Now, let's consider the spelling of the Latin Friday when seen by English-reading eyes: "Dies Veneris." More like Venus Dies. What does the priestly promoted fear of Friday the 13th teach? Can you sense the same trickery that lives in the Venusian etymology of words like venom, venal, venial and venereal disease??? Are we being taught to fear the Goddess in all of her Sacred forms?
Love and Planets,