The people of Texas are informed that, in accordance with a proclamation from the Executive of the United States, all slaves are free.”History of the dayIn 1979, Texas became the first state to officially recognize Juneteenth as a holiday,

Yes, Juneteenth is a state holiday in Missouri and is observed every 19th day of June. As such, all state offices are closed on that day, unless it falls on the weekend, in which case offices will be closed either the preceding Friday or following Monday.