1. Pioneer Day: July 30th is a significant day in Utah's history because it is Pioneer Day, which commemorates the entry of Brigham Young and the first group of Mormon pioneers into the Salt Lake Valley in 1847. This event marked the beginning of the settlement of the Intermountain West by Mormons and other pioneers who sought a new life in the frontier.

2. SLC Olympics: Another significant event that took place on July 30th in Utah's history was the opening ceremony of the 2002 Winter Olympics, which were held in Salt Lake City. This was the first time that the Olympics had been held in the United States since the 1984 Summer Olympics in Los Angeles.

3. Earthquake: On July 30, 1967, a magnitude 5.2 earthquake struck the Wasatch Front, causing minor damage but also reminding residents of the region's active seismic activity. Utah is located on the western edge of the Rocky Mountains, and earthquakes are a part of the state's geological profile.

4. Statehood day: On July 30th, 1896, President Grover Cleveland signed a proclamation making Utah the 45th state in the union. After years of controversy over the territory's Mormon population and other issues, statehood was finally granted to Utah after it agreed to abandon polygamy and adopt a new state constitution.

5. Railroad completion: July 30, 1869, is the date on which the final spike was driven into the transcontinental railroad, which connected the East Coast to the West Coast for the first time by rail. While not specific to Utah, the completion of the railroad had significant implications for the state, enabling greater travel and commerce across the country and driving population growth and development throughout the West.