1. May 1, 1888, was the day Wyoming became the first state to grant women the right to vote. This was more than 30 years before the 19th Amendment was ratified and made suffrage a right for women all across the United States.

2. May 1, 1903, marked the day the legendary outlaw Butch Cassidy (real name Robert LeRoy Parker) was pardoned by the governor of Wyoming. Cassidy had been serving time in the Wyoming State Penitentiary for a train robbery in which a man had been killed.

3. On May 1, 1931, the state of Wyoming officially adopted the bucking horse as its state symbol. The bucking horse is the emblem of the Wyoming brand, and it represents the state's independent spirit and rugged, wild nature.

4. May 1, 1945, was the day that Wyoming native and World War II hero Carl E. Lien died in a Japanese prisoner of war camp. Lien was awarded the Medal of Honor for his bravery during the Battle of Buna-Gona in 1942, and he is remembered as one of the greatest heroes of the war.

5. In recent times, May 1 has become known as International Workers' Day, or May Day, and it is celebrated in Wyoming and across the country as a day of labor solidarity and protest. Workers in Wyoming have marched and rallied on May 1 to demand fair wages, better working conditions, and a stronger voice in their workplaces.