Here are several years of free printable December calendars for your personal use. Our downloadable .pdf files are convenient and easy-to-print with almost any computer and printer with Adobe Reader. They print on standard 8 ½ inch by 11 inch paper. The month of December has 31 days and we have included four important days for your reference. These are: Pearl Harbor Remembrance Day, the first day of winter, Christmas and New Year's Eve.