People have different 'traditions' for celebrating the New Year. For me, it's time to get out my favorite Yosemite map and the new calendar and start thinking about adventures for the upcoming Summer.
It's not too early!
You can make reservations for backpacking trips 24 weeks in advance and many Yosemite Valley campgrounds require reservations from March through November.
http://www.nps.gov/yose/planyourvisit/camping.htm