Quite a fancy play with words in there. Anachronism bascially means something that belongs to another time. The word is made of two words – Ana and Chronism. Chronism as we know is greek for time. That should give you a hint about what the word could possibly mean.
Society for Creative Anachronism (usually shortened to SCA) is a historical re-creation and living history group founded in 1966 in California, which attempts to recreate pre-17th century Western European history and culture. The SCA describes itself as a group devoted to the study of the Middle Ages As of December 2007, the Society has over 30,000 paying members
The Society for Creative Anachronism’s roots can be traced to a backyard graduation party of a medieval studies graduate, the author Diana Paxson, in Berkeley, California on May 1, 1966.
The graduation party began with a “Grand Tournament” in which the participants wore motorcycle helmets, fencing masks, and usually some semblance of a costume, and whacked away at each other with weapons including plywood swords, padded maces, and even a fencing foil. It ended with a parade down Telegraph Avenue with everyone singing “Greensleeves”. It was styled as a “protest against the 20th century”. The SCA still measures dates within the society from the date of that party, calling the system Anno Societatis (Latin for “Year of the Society”). For example, 1 May 2008 – 30 April 2009 is A.S. XLIII. The name “Society for Creative Anachronism” was coined by science fiction author Marion Zimmer Bradley, an early participant, when the nascent group needed an official name in order to reserve a park for a tournament.
In 1968, Bradley moved to Staten Island, New York and founded the Kingdom of the East, holding a tournament that summer to determine the first Eastern King of the SCA. That September, a tournament was held at the World Science Fiction Convention, which was in Berkeley that year. The SCA had produced a book for the convention called A Handbook for the Current Middle Ages, which was a how-to book for people wanting to start their own SCA chapters. Convention goers purchased the book and the idea spread. Soon, other local chapters began to form. In October of 1968, the SCA was incorporated as a 501(c)3 nonprofit corporation in California.
(Sourced from Wikipedia)