Martin Luther King Jr. Day Calendar When: January 21, 2019 all-day 2019-01-21T00:00:00-06:00 2019-01-22T00:00:00-06:00 Where: USA Holiday 3rd 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