1. In 1850, Utah Territory was officially organized by an act of Congress, with Brigham Young appointed as governor. This marked a significant milestone in the history of the state, paving the way for its eventual admission to the Union as the 45th state in 1896.

2. On March 18, 1859, the first mail arrived in Salt Lake City via the famous Pony Express. The Pony Express was a revolutionary mail delivery service that operated from April 1860 to October 1861, carrying mail between St. Joseph, Missouri, and Sacramento, California, in record time.

3. In 1877, Mormon pioneers began construction of the St. George LDS Temple, the oldest operating temple of The Church of Jesus Christ of Latter-day Saints. The temple, located in the city of St. George in southwest Utah, is known for its unique architecture and beautiful gardens.

4. March 18, 1922, marked the dedication of Provo's majestic Brigham Young University. The university is a private, nonprofit institution of higher learning owned and operated by the LDS Church, and is one of the largest private universities in the United States.

5. On March 18, 1962, a devastating landslide struck the small town of Thistle, Utah, burying much of the town under 300 feet of debris. The disaster, caused by heavy rainfall, led to the abandonment of the town and forced the relocation of its residents. The area remains a popular destination for hikers and nature enthusiasts, with many of the abandoned buildings still visible today.