Martin Luther King Jr. Day
noun /ˌmɑːtɪn ˌluːθə ˌkɪŋ ˈdʒuːniə deɪ/
/ˌmɑːrtn ˌluːθər ˌkɪŋ ˈdʒuːniər deɪ/
- a national holiday in the US on the third Monday in January to celebrate the birthday of Martin Luther King, Jr., who was active in the struggle to win more rights for African Americans