Martin Luther King Jr. Day Calendar When: January 18, 2010 all-day 2010-01-18T00:00:00-06:00 2010-01-19T00:00:00-06:00 Where: USA Holiday Third Monday in January. Each year on the third Monday of January, America honors the birth, life and dream of Dr. Martin Luther King, Jr. Information provided by www.officeholidays.com