The number 13 you will find has many historical connections to both religion and secret societies. In particular, Christianity, the Freemasons and Knights Templars. All groups who I consider to be a Universal Brotherhood, and builders who have helped shape the world as we know it today.
With that said, there is a secret reason why Friday and the number 13 have a very significant meaning in our world. A meaning that is only known to the initiates of the highest degrees.
WHAT DOES NUMBER 13 MEAN?
In the occult, the number 13 is both a lucky number and an unlucky number. 12 is a complete number, and 13 in excess of being complete. That is why in the heavens and on earth we have 12 signs of the zodiac, 12 months of the year, 12 hours of day, 12 hours of night, 12 inches in a foot, 12 grades in school, 12 step-programs, 12 jurors, etc.
The bible is important to Christians, and Freemasons. Most all the U.S. Presidents take their oaths on the Masonic Bible upon which George Washington swore his oath of office. The number 12 has a significant meaning in the bible. The 12 tribes of Israel, 12 Apostles of Jesus, the 12 patriarchs, and 12 days of Christmas. Saint Augustine in de Doctrina Christiana had written, “The number Twelve multiplied into Twelve makes One Hundred and Forty Four, the number in the Apocalypse, which designates the traiversal Society of the Saints:” and here, “centum quadraginta quatuor Millia omnis omninb Ecclfsia eit.”
Thirteen is a number connected to the planet Venus. The planet of love and hell.
It represents femininity, because it corresponded to the number of lunar (menstrual) cycles in a year (13 x 28 = 364 days). The letter M is also 13th letter of the alphabet. The value of the letter M of Mary, center of the Latin alphabet, is 13. Likewise 13 words compose the invocation to the Virgin on the Miraculous Medal: O Mary, conceive without sin, pray for we who have recourse to you.
In the bible, The dragon, a symbol for Satan, is found 13 times in Revelation. Satan is behind all rebellion against God. The thirteenth chapter of the Revelation is reserved to the Antichrist and to the Beast.
In ancient Babylon, the Code of Hammurabi, the number 13 is omitted in the list of laws.
13 is just unnatural and 1 number above the complete number 12. As a result, our world has been thrown into chaos. An event that we can call ORDO AB CHAO, with 13 being CHAO, and 12 the ORDO we pray for.
WHY IS THERE A TRADITION OF FEAR OF THE DAY FRIDAY?
Friday was the day that Jesus was crucified, and since this time, this day has been associated with death and to be an ill omen. In fact, Friday has a deep history as the day when most executions had occurred. The day of sacrifice in the past, when many people had met the hangman's noose or were tied to a stake and burned in the flames for their alleged sins.
The fear of Friday the 13th has been called friggatriskaidekaphobia (Frigga being the name of the Norse goddess for whom "Friday" is named in English, and triskaidekaphobia meaning fear of the number thirteen), or paraskevidekatriaphobia a concatenation of the Greek words Paraskeví (Παρασκευή, meaning "Friday"), and dekatreís (δεκατρείς, meaning "thirteen") attached to phobía (φοβία, from phóbos, φόβος, meaning "fear"). The Norse name for the planet Venus was Friggjarstjarna 'Frigg's star'.(Wikipedia)
In Old Norse and German Teutonic mythology, the Queen named Helheim (domain of the dead) of Nifelheim ruled the Land of the Dead and she became the Old Anglo-Saxon Hela, Hel and Hell. The same queen, from which we get the current English word hell.
Manly P. Hall explains this connection with the feminine Venus, the color green and religion in his book, The Secret Teachings of all Ages; "The feminine principle is repeatedly emphasized in Islamic symbolism. For example, Friday, which is sacred to the planet Venus, is the Moslem’s holy day; green is the color of the Prophet and, being symbolic of verdure, is inevitably associated with the World Mother; and both the Islamic crescent and the scimitar may be interpreted to signify the crescent shape of either the moon or Venus."
Before Jesus had been killed upon a cross, he was among 13 people present at the Last Supper. Quite possibly there is a person at the Last Supper who is not supposed to be there at the table.
Could this be Mary?
In the hit blockbuster movie "The Da Vinci Code," author Dan Brown mentions that Mary Magdalene may be the person sitting next to Jesus in The Last Supper. He also points out that if you trace the bodies of Jesus and the person to his right, they form an M which may in fact represent Mary Magdalene.
M is the 13th letter of the English alphabet, and the name Mary Magdalene has 13 letters.
There were 13 original colonies that formed the U.S.A. One of the United States first colonies was Maryland which is also considered to be the birthplace of religious freedom in America when it was made a refuge for persecuted Catholics from England by George Calvert the first Lord Baltimore, and the first English proprietor of the then-Maryland colonial grant. The new settlement was called " St. Mary's City" and it became the first capital of Maryland, and remained so for sixty years until 1695. Many historians believe Maryland was named after the Virgin Mary. (Wikipedia)
Is this all just a coincidence?
There are 13 leaves on the left olive branch with 13 berries. 13 stripes on the middle shield. 13 arrows on the right. 13 stars above the eagle's head. 13 letters in the "E Pluribus Unum" on the ribbon. 13 letters in Annuit Coeptis. There are 13 blocks top to bottom on the pyramid.
The Knights Templar were said to worship the Goddess. One of the most famous Friday the 13ths was in 1307 when the protectors of Jerusalem, the Knights Templar were arrested by the King of France upon the Pope's orders. They were later tortured into a “confession” of heresy and many of them were executed for their alleged heretic crimes.
In the year 1792 on October 13th in Washington, D.C., the cornerstone of the United States Executive Mansion (known as the White House since 1818) was laid.