According to the Wyoming State Historical Society, on May 9, 1934, a Veteran's Administration Hospital opened for patients in Cheyenne. On May 11, 1940, radio star Gracie Allen arrived at the Union Pacific Depot in Cheyenne. And on May 12, 1944, seven of Wyoming's hospitals were selected for penicillin distribution.

The Worland Grit reported on May 9, 1918, that motorcycles were going to be allowed in Yellowstone National Park for the first time.

On May 11, 1918, the Deaver Sentinel in Big Horn County wrote that the first baby was born in the town. The baby boy had been born a week before and was named Howard Howell Arnout.

The Casper Daily Tribune reported on May 11, 1924, that the local high school carpentry class was building a new auto mechanic building for the school. The building was going to have a classroom, tool and wash rooms, and four individual car stalls that could be locked separately. The building was expected to be completed by the end of the month. Then, the auto mechanic class would repair cars for the community at only the cost of materials.