It's winter solstice, too. Shortest day of the year and all that.
Burning Couch is uniquely antipodean and all those other fun parts of the world in the Southern Hemisphere. Indeed the word itself is derived from an early type of ancient wooden couch. ?'Hemi', meaning half, and ?'Sphere' referring the circular aspect of a log, and ?'Southern' meaning to lie on or with the bottom part (rather than with the very heavy and possibly fatal top part).
So Southern Hemisphere literally means ?'to lie on the bottom half of a log' or the other way round - the word order not the log! OK, look if you are really having trouble with this ask Melbournexpert.
Burning Couch will be governed by about 10 principles and 17 slabs. These include gifting, decommodification, radical self-reliance, communal effort, civic responsibility, participation, and immediacy.