The United States Congress, specifying the requirements…
August 1876 CE
The United States Congress, specifying the requirements for the Territory of Colorado to become a state, had passed an enabling act on March 3, 1875,.
On August 1, 1876 (twenty-eight days after the Centennial of the United States), U. S. President Ulysses S. Grant signs a proclamation admitting Colorado to the Union as the 38th state and earning it the moniker "Centennial State".