1. In 1863, the first Utah territorial election was held. This election marked the beginning of more representative government in Utah, as the territory previously had been governed by appointed officials.

2. On October 3, 1873, Brigham Young University (BYU) was established in Provo, Utah. Originally called Brigham Young Academy, the school was founded by the Church of Jesus Christ of Latter-day Saints and has since become one of the largest and most prestigious universities in the western United States.

3. In 1918, Utah became the 16th state to ratify the 19th Amendment to the U.S. Constitution, which granted women the right to vote. This was a significant moment in the state's history and helped pave the way for greater gender equality in Utah and across the country.

4. On October 3, 1935, the Hoover Dam was completed after five years of construction. The dam spans the Colorado River between Nevada and Arizona and is one of the largest hydroelectric power generators in the world. Its completion was a major engineering feat and a significant moment in the history of the American West.

5. In 2018, the LDS Church announced that it would be lowering the age requirement for full-time missionary service for young men from 19 to 18. The change was implemented on October 3 of that year and was seen as a way to increase the number of missionaries serving around the world. It has since led to a significant increase in the number of young men and women volunteering to serve missions for the LDS Church.