1. In 1850, the first Mormon pioneers arrived in the Salt Lake Valley, after completing their journey from Illinois via the Mormon Pioneer Trail. They settled in the area that would later become Salt Lake City, and their arrival marked the beginning of a new era in Utah history.

2. In 1889, a fire broke out in the Utah State Penitentiary, killing six inmates and causing extensive damage to the facility. The fire was started by a prisoner who was attempting to escape, and it resulted in the resignation of the prison warden.

3. In 1917, the United States declared war on Germany, entering World War I. Utah played a significant role in the war effort, with thousands of soldiers from the state serving in the military and several munitions factories being established in the state to support the war effort.

4. In 1934, the Dionne quintuplets were born in Ontario, Canada, becoming the first known set of quintuplets to survive infancy. The quintuplets became international celebrities, and in 1936 they were brought to Utah to film a movie.

5. In 2013, the Salt Lake City Marathon was held on April 16, marking the 10th anniversary of the event. The marathon is a popular annual event in Utah, attracting thousands of runners from across the state and beyond.