1. In 1900, the town of Sheridan, Wyoming was officially incorporated on March 12th. Sheridan is located in the north-central part of the state and is known for its rich history in the coal mining industry.

2. On March 12, 1885, Wyoming Territory Governor Francis E. Warren signed the bill giving women the right to vote. Wyoming was the first state or territory in the United States to grant women suffrage, a historic moment for women's rights.

3. On March 12, 1890, the University of Wyoming became the first institution of higher learning in Wyoming when Governor Warren signed the bill creating the university. The university has since grown into a major research university, known for its excellence in engineering and energy resources.

4. In 1978, a massive blizzard hit southeastern Wyoming on March 12th. The storm brought with it heavy snowfall and high winds, causing power outages and closing roads. The blizzard ultimately caused millions of dollars in damage and took several days for recovery efforts to be completed.

5. On March 12, 1938, the town of Cody, Wyoming celebrated the grand opening of the Buffalo Bill Dam. The dam was built across the Shoshone River and was the highest concrete dam in the United States at the time, standing at 325 feet tall. Today, the dam still stands as a major tourist attraction and provides irrigation water to the surrounding agricultural areas.