https://en.wikipedia.org/wiki/Juneteenth

Juneteenth (a portmanteau of June and nineteenth;^[2] also known as Freedom Day,^[3] Jubilee Day,^[4] Liberation Day^[5], and Emancipation Day^[6]) is a proposed federal holiday celebrating the emancipation of those who had been enslaved in the United States. Originating in Texas, it is now celebrated annually on the 19th of June throughout the United States, with varying official recognition. Specifically, it commemorates Union army general Gordon Granger announcing federal orders in Galveston, Texas, on June 19, 1865, proclaiming that all slaves in Texas were free.^[7] 

Areas covered by the Emancipation Proclamation are in red. Slave-holding areas not covered are in blue.

During the American Civil War, President Abraham Lincoln issued the preliminary Emancipation Proclamation on September 22, 1862.^[13] It was formally issued on January 1, 1863, declaring that all enslaved persons in the Confederate States of America in rebellion and not in Union hands were freed.^[13]

More isolated geographically, planters and other slaveholders had migrated into Texas from eastern states to escape the fighting, and many brought enslaved people with them, increasing by the thousands the enslaved population in the state at the end of the Civil War.^[14] Although most lived in rural areas, more than 1,000 resided in both Galveston and Houston by 1860, with several hundred in other large towns.^[15] By 1865, there were an estimated 250,000 enslaved people in Texas.^[14][16]

The news of General Robert E. Lee's surrender on April 9, 1865, reached Texas later in the month.^[2] The western Army of the Trans-Mississippi did not surrender until June 2.^[17] On June 18, Union Army General Gordon Granger arrived at Galveston Island with 2,000 federal troops to occupy Texas on behalf of the federal 

  Recognition of Juneteenth as a holiday in the US

  Recognized before 2000

  Recognized between 2000 and 2009

  Recognized in 2010 or after

Texas was the first state to recognize the