April 12

1890 Natrona County was created May 9, 1888 and organized April 12, 1890.

1934 Harry Sinclair bought the refinery and the town of Parco on April 12, 1934 and renamed it Sinclair.

1911 Converse County's Carnegie Library building was officially accepted in formal ceremony on April 12, 1911. A new Converse County Library was dedicated on April 21, 1968. It was erected on the same site as the original Carnegie Library stood. Click here to read more about the history of the Converse County Library.