January 1 - New Year’s Day is a public holiday in the United States. All banks and businesses will be closed. However, many shops and grocery stores, especially in big cities and tourist destinations, will be open. Check the destination you are visiting for further details.
January 1 - Rose Parade. An annual tradition, and an event tied to the annual Rose Bowl football game, the Rose Parade is a caravan of floats made only from flowers and other botanical items. Learn more about the Rose Parade.
Third Monday in January - Birthday of Dr. Martin Luther King, Jr. Banks, shops, businesses, and schools honor the legacy of Martin Luther King, Jr. by closing on the third Monday each January. Dr. King’s actual birthday is January 15, but the holiday is always observed on the third Monday. Many cities in the U.S. hold special events in honor of Dr. King on this holiday, but especially Atlanta and Memphis.
January 20 - Inauguration Day. Following the election of the President of the United States every four years in November, Inauguration Day is held on January 20 in Washington, DC. Learn more about Inauguration Day in Washington, DC, from About.com’s Guide to DC Travel.
Late January - Sundance Film Festival. Hollywood types descend on Park City, Utah, during the later part of January to watch the latest independent films participating in the Sundance Film Festival. Learn more about the Sundance Film Festival.