1. The Mountain Meadows Massacre occurred on September 10, 1857, when a group of Mormons and Native Americans attacked a wagon train of emigrants traveling through southern Utah. Over 120 people were killed in the massacre, which has been a controversial event in Utah history ever since.

2. On September 10, 1896, Utah became the 45th state in the United States. The state had been a territory since 1850 and had been seeking statehood for many years before being admitted to the union.

3. The LDS Conference Center, a large building in downtown Salt Lake City used for religious and cultural events, was dedicated on September 10, 2000. The building has a seating capacity of over 21,000 and is a major landmark in the city.

4. Lagoon Amusement Park, a popular attraction in Farmington, Utah, opened on September 10, 1886. The park initially featured a swimming pool and dance hall, but over the years has expanded to include roller coasters, water rides, and other attractions.

5. The University of Utah, a major public research university in Salt Lake City, was founded on September 10, 1850, just four years after the Mormon pioneers arrived in the area. The university now has over 31,000 students and is known for its strong programs in science, engineering, and health sciences.