I have had a few personal literary traditions of long standing about this time of year, dating from my high school reading. Some books are inextricably linked in my mind with the mood of December--Walter Scott's Ivanhoe, Kenneth Grahame's The Wind in the Willows, and Bill Watterson's Calvin and Hobbes were usual re-reading for me in this time of year.
New Years Eve I still read Ring out, wild bells from Tennyson's In Memoriam, and January is given over to Robert Burns. This December I have my own apartment again for the first time in ~4 years. Looking forward to that!