1. The Wyoming Territory was established on May 28, 1868, by an act of the United States Congress. The territory was created from parts of the Dakota, Utah, and Idaho territories, and included present-day Wyoming, Montana, and portions of Nebraska and South Dakota.

2. In 1918, an oil field was discovered near Midwest, Wyoming, on May 28. The discovery led to a boom in the oil industry in the state, with companies like Standard Oil and Sinclair Oil opening refineries and pipelines throughout the region.

3. On May 28, 1934, the famous aviator Amelia Earhart landed in Cheyenne, Wyoming, while on a cross-country flight from Los Angeles to New York. She stopped in Cheyenne to refuel her plane and meet with local officials before continuing on her journey.

4. The Wyoming State Capitol building was officially dedicated on May 28, 1930. The building, located in Cheyenne, was designed by architect David W. Gibbs and features a neoclassical design with a central dome and columns.

5. In 2006, the Wyoming State Legislature passed a bill designating May 28 as "John W. Davis Day" in honor of the former governor of the state. Davis served as governor from 1955 to 1959 and was known for his efforts to improve education in the state, including the creation of the Wyoming Community College Commission.