Happy New Year! It is now Anno Societatus LIV (54).
From the SCA website:
SCA newsletters and award ceremonies use a special calendar, numbering our years starting with the year the SCA was founded. Years are specified as “Anno Societatis, or A.S. – (Latin for “in the year of the Society”) followed by a number, usually expressed in Roman numerals.
Our “New Year’s Day” is May 1st, the day that the First Tournament was held in 1966.