1928 Oregon Basin Post Office was established on February 18, 1928. Oregon Basin was named for the Oregon Basin of Park County.
1987 The cutthroat trout became Wyoming's State Fish on February 18, 1987. Cutthroat Lakes in Sublette County
1987 Knightia became Wyoming's State Fossil on February 18, 1987. Places with Fossil in their name.
1993 The horned toad was adopted as the State Reptile on February 18, 1993
1994 The North Casper Clubhouse and the Casper Tribune Building were added to the National Register of Historic Places on February 18, 1994.