Decisions, decisions..
December the 31st - end of a year. Oddly enough 1st of January, the first day of a new year, lands in the middle of winter. Looks to me like someone just randomly picked a day. It would be much more logical to start the year in March, when the Earth awakens. But that's the thing. May may (pun intended)not be the same for me and someone on the southern hemisphere. And while I'm putting on the third pair of socks on my feet (number four standing by) some lucky koala lovers are soaking in the ocean. It's arbitrary.
Come to think of it, almost everything in our society (and others) is arbitrary. Whether Pluto is a planet