1. The first settlers arrived in Utah: On October 31, 1848, the first group of Mormon pioneers arrived in Salt Lake City. Led by Brigham Young, they had completed a long and perilous journey across the country to settle in what was then Mexico.

2. Utah became a state: On October 31, 1895, Utah officially became a state of the United States. This was the culmination of years of struggle by the people of Utah to achieve statehood.

3. The first plane landed in Utah: On October 31, 1911, the first airplane arrived in Utah. The plane, a Curtiss biplane, landed in Salt Lake City, marking the beginning of a new era in transportation in the state.

4. The first radio station in Utah went on the air: On October 31, 1922, radio station KZN went on the air for the first time in Salt Lake City. It was the first radio station in Utah and one of the first in the country.

5. The first power plant in Utah was built: On October 31, 1901, the first power plant in Utah was built in Salt Lake City. The plant used coal to generate electricity and was the beginning of the state's long history of energy production.