1. On April 22, 1908, the Montana State Capitol building in Helena was dedicated, after construction had been completed the previous year. The building, designed by Charles Bell and John Kent, is still in use today and is listed on the National Register of Historic Places.

2. In 1913, on April 22nd, future U.S. Senator Mike Mansfield was born in New York City. Mansfield would move to Montana and serve as U.S. Senator from 1953-1977, and then as Ambassador to Japan from 1977-1988.

3. April 22, 1959 saw the first issue of the Missoulian newspaper, which is still published in Missoula today. The paper covers local news, sports, and regional topics of interest.

4. On April 22, 1975, the Ovando-Fudge Creek earthquake struck western Montana. The 6.1 magnitude earthquake caused significant damage to buildings and infrastructure in the area, but there were no deaths.

5. In 2008, on April 22nd, Montana Governor Brian Schweitzer signed a bill making Montana the first state in the country to require that a certain percentage of energy produced in the state come from renewable sources. The law was seen as a major step forward in the use of clean energy in the state.