Here are a few links to Library of Congress blogs and materials to get you in the holiday mood.
Songs of the Winter Season Collected by Sidney Robertson Cowell Collected by the California Works Progress Administration 1938-1939. Here you'll find some wonderful ethnic and folk songs for the holidays.
Topics in Chronicling America: "Please tell me the truth, is there a Santa Claus?" "In 1897, Virginia O'Hanlon writes to the New-York Sun with a simple question and the response goes on to become the most famous newspaper editorial ever published....This topic page provides useful information for searching about the famous "Yes, Virginia, There is a Santa Claus" editorial in Chronicling America's historic newspapers, including significant dates, associated search terms, as well as sample article links... Read more about it!" Click on the links to the articles on the bottom to put yourself in a holiday mood.
After checking out these holiday links take a side trip to the LOC Blog Page and sign up for those that interest you.