Several States in the U.S. Celebrate an Independence Day or Statehood Day when the state became independent from another country and/or joined the Union and became part of the U.S.
Statehood Day is a holiday celebrated each year in Kentucky. It celebrates Kentucky becoming the 15th state in the Union on June 1st 1792. It is not a federal holiday, it is a day where local businesses hold events to celebrate their Statehood.