I'm not sure if it's ironic or coincidental that the six month mark of our arrival in the UK is today: Friday, the 13th. Seems appropriate, however. Personally, thirteen has been a lucky number for me and appears in my life seamlessly: 13 days between meeting my husband and our first date, 13 tables at my wedding, etc. I think 13 has received a bad rap.
Fear of Friday the 13th is called friggatriskaidekaphobia, frigga, meaning "Friday" and triskaidekaphobia, or paraskevidekatriaphobia, a word derived from the concatenation of the Greek words Paraskeví (Friday) and dekatreís (13), attached to phobía (fear). The word was derived in 1911 and first appeared in a reference text in 1953.
However, there is no written evidence for a "Friday the 13th" superstition before the 19th century. The earliest documented reference occurs in an 1869 biography of Gioachino Rossini, who ironically (coincidentally?) died on November, Friday the 13th that year.
But there are many different theories on the topic. One states that that it is a modern amalgamation of two older superstitions: that thirteen is an unlucky number and that Friday is an unlucky day.
In numerology, the number twelve is considered the number of completeness, as reflected in the twelve months of the year, twelve signs of the zodiac, twelve hours of the clock, twelve tribes of Israel, twelve Apostles of Jesus, twelve gods of Olympus, etc., whereas the number thirteen was considered irregular, transgressing this completeness. There is also a superstition, thought by some to derive from the Last Supper or a Norse myth, that having thirteen people seated at a table will result in the death of one of the diners.
Friday has been considered an unlucky day at least since the 14th century's The Canterbury Tales, and many other professions have regarded Friday as an unlucky day to undertake journeys or begin new projects. Black Friday has been associated with stock market crashes and other disasters since the 1800s.It has also been suggested that Friday has been considered an unlucky day because, according to Christian scripture and tradition, Jesus was crucified on a Friday.
But, even with all that hanging over me - I'm hoping to have a banner day. And I hope you do too!
(This information was gathered from several sources including Wikipedia, online articles and google).