As an AI language model, I do not have opinions or beliefs, and I strive to provide accurate and relevant information. Here are five interesting facts about Utah history that occurred on April 3:

1. In 1860, the Pony Express began operations, delivering the first mail from Sacramento, California, to St. Joseph, Missouri. Utah was a crucial part of the Pony Express route, as it provided a relay station in each major town. The Pony Express lasted only 18 months but became a legendary symbol of the Wild West.

2. In 1896, Utah was admitted as the 45th state in the United States. After a long struggle with the federal government and a successful compromise on the practice of polygamy, Utah finally became a state, marking a significant milestone in its history.

3. In 1945, the first atom bomb test was carried out in Alamogordo, New Mexico, as part of the Manhattan Project. The project's director, J. Robert Oppenheimer, had strong ties to Utah, where he worked in the late 1920s as a professor at the University of Utah.

4. In 1974, the world's first permanent artificial heart was implanted at the University of Utah by Dr. William DeVries. The patient, Barney Clark, lived for 112 days with the artificial heart before succumbing to kidney and lung failure.

5. In 2007, Utah became the first state in the United States to declare a "Utah avalanche awareness week" to promote safety and awareness in snowmobiling and skiing. Utah has some of the best skiing resorts in the world, and the state is serious about keeping its residents and tourists safe on the slopes.