1. The driving of the Golden Spike - On May 10, 1869, the completion of the transcontinental railroad was marked by the driving of the Golden Spike. The event took place at Promontory Summit in Utah, where the Union Pacific and Central Pacific railroads met.

2. Utah becomes a state - On January 4, 1896, Utah became the 45th state in the United States. This was a significant milestone for Utah, as it had been a territory for nearly 50 years.

3. Salt Lake City hosts the Winter Olympics - In 2002, Salt Lake City hosted the Winter Olympics. This was the first time that the Winter Olympics had been held in the United States since 1980, and it was a major event for the city of Salt Lake City.

4. Brigham Young establishes Salt Lake City - In 1847, Brigham Young led a group of Mormon pioneers to the Salt Lake Valley. He selected a spot near the Great Salt Lake to establish a new settlement, which would become Salt Lake City.

5. The Mountain Meadows Massacre - On September 11, 1857, a group of emigrants traveling through Utah were attacked by a group of Mormons and Native Americans. The attack, known as the Mountain Meadows Massacre, resulted in the deaths of approximately 120 people. The incident remains one of the darkest moments in Utah's history.