1. On April 2, 1869, the Wyoming Territorial Legislature passed an act providing for the establishment of the University of Wyoming, making it the first institution of higher education in the state. The university officially opened its doors in 1887.

2. April 2, 1872, marks the date when Yellowstone National Park was officially designated as the first national park in the world. The park is located mainly in Wyoming, with parts also extending into Montana and Idaho.

3. In 1900, the Feast of Saint Francis Xavier was celebrated for the first time at the St. Stephens Mission on the Wind River Reservation in Wyoming. The feast is still celebrated annually and is an important cultural event for the Eastern Shoshone and Northern Arapaho tribes.

4. On April 2, 1923, the Wyoming State Penitentiary in Rawlins was destroyed by a fire, killing five inmates and causing significant damage. The prison was rebuilt and continues to operate today as the Wyoming State Penitentiary.

5. Wyoming Governor Nellie Tayloe Ross signed the state's first child labor law on April 2, 1919. The law prohibited children under the age of 14 from working in mines, smelters, or any other hazardous conditions. It also required employers to obtain a certificate of age for any child under 16 that they employed.