1. On March 13, 1867, the first issue of the Montana Post was published in Virginia City. This newspaper was known for its provocative editorials and was popular during Montana's gold rush period.

2. In 1899, the Montana State Legislature designated March 13 as "State Arbor Day" to promote the planting of trees and preservation of Montana's forests.

3. On March 13, 1911, the city of Butte experienced one of the worst snowstorms in its history. Over 21 inches of snow fell in just three days, causing massive disruptions to transportation and power lines.

4. In 1943, the Anaconda Copper Company agreed to provide housing for Japanese-American internees being released from internment camps. This decision was made on March 13 and helped to ease the return of these individuals to civilian life.

5. In 2015, a group of residents in the town of Ekalaka successfully fought to have March 13 recognized as "Ekalaka Day". This holiday celebrates the town's founding and features a parade, live music, and carnival games.