To figure out what Year of Our Lady Discord it is, the curious person may add the current Gregorian year to 1166 (11 + 66 = 77, which is two sevens; two from seven is five. Eris had returned to us that year, and from then on we have been living in Her radiance. The incurious person could do very much the same thing, but doubtless would not be nearly as satisfied with the resultant knowledge. As an example, the year 2007 in Gregorian is the year 3173 YOLD (or Erisian). You can use ddate Perl script , ddate Ruby Gem or simply type ddate in Linux console