Juneteenth
noun
June·teenth ˌjün-ˈtēn(t)th 
: June 19 observed as a legal holiday in the United States in commemoration of the end of slavery in the U.S.
Note: The federal name for this holiday according to the United States Code is Juneteenth National Independence Day. It is also called Black Independence Day, Emancipation Day, Freedom Day, Jubilee Day, and Juneteenth Independence Day.
Word History
Etymology
blend of June and nineteenth
First Known Use
1890, in the meaning defined above