Here are printable October calendars, which can be downloaded and used for free! The calendars are downloadable .pdf files which are easy-to-print on almost any type of printer from Adobe Reader. Our calendars are designed to fit on a standard 8 ½ x 11 inch sheet of paper. For your convenience was have marked two October holidays. They are Columbus Day (to honor Christopher Columbus' arrival in the Americas) and Halloween (aka "all Saints' Eve).