1. The first permanent settlement of European immigrants in Utah was founded on December 23, 1847. Brigham Young led a group of Mormon pioneers to the Salt Lake Valley and established the city of Salt Lake City.

2. On December 23, 1998, the LDS Church dedicated the Conference Center in downtown Salt Lake City. This massive structure can seat 21,000 people and is used for various events, including general conferences of the church.

3. The first professional basketball team in Utah, the Utah Stars, played their first game on December 23, 1970. The Stars were part of the American Basketball Association and played in Salt Lake City until 1975.

4. In 1863, Utah became the first state or territory in the United States to grant women the right to vote, though it would be several years before it was widely exercised. This landmark legislation was passed by the territorial legislature on December 23, 1863.

5. The Great Basin National Park, located in eastern Nevada, was designated as a national park on December 23, 1986. The park encompasses over 77,000 acres and features stunning scenic views, hiking trails, and unique geological formations.