1. Utah Became a State: On June 12, 1896, Utah became the 45th state in the United States. This was a significant milestone for the state, which had undergone a tumultuous path to statehood. Utah's bid for statehood had been delayed for decades due to conflicts over issues such as polygamy, but with the passage of the Enabling Act in 1894, the way was finally cleared for Utah to join the Union.

2. Tornado Strike: One of the deadliest and most destructive tornadoes in Utah history struck on June 12, 1980, hitting the towns of Woodscross and Bountiful. The tornado, which was rated F3 on the Fujita scale (meaning it had winds ranging from 158 to 206 mph), caused significant damage to homes and businesses, and left four people dead and dozens injured.

3. Pioneer Day Holiday: In Utah, June 12 is also observed as Pioneer Day, a state holiday that commemorates the arrival of Mormon pioneers in the Salt Lake Valley on July 24, 1847. The holiday is celebrated with parades, picnics, fireworks, and other festivities throughout the state, and is an important part of Utah's cultural heritage.

4. Historical Earthquake: Utah experienced a significant earthquake on June 12, 1914, when a magnitude 6.2 quake struck near the town of Milford. The earthquake caused damage to buildings and infrastructure throughout the surrounding area, and was widely felt in Salt Lake City, approximately 200 miles away.

5. Tragic Mining Disaster: On June 12, 1923, a catastrophic mining disaster occurred in the town of Castle Gate, Utah. The Castle Gate Mine, operated by the Utah Fuel Company, exploded, killing 172 miners and injuring dozens more. The disaster was one of the worst in U.S. mining history, and had a profound impact on the local community and the mining industry as a whole.