New Jersey observes the state holiday of Juneteenth 2022 on June 17. It celebrates the day in 1865 when enslaved Black people in Galveston, Texas, learned that the Emancipation Proclamation had freed them. Here is everything to know about Juneteenth 2022 in New Jersey. Is Juneteenth a state holiday? It is a state holiday in New Jersey, and it is now a federal holiday after President Biden signed bills the House and the Senate passed last year. Is the post office open on the state-observed holiday of Juneteenth? The post office will conduct business as usual, as it only observes the federal obs…