1. The Utah War officially ended on April 6, 1858, when the US Army officially took over control of Utah Territory from Brigham Young and the Mormon settlers. This event marked the resolution of a long-standing conflict between the federal government and the Church of Jesus Christ of Latter-day Saints over issues of governance and religious autonomy.

2. On April 6, 1892, the Salt Lake Temple was dedicated by Church President Wilford Woodruff after 40 years of construction. The temple, one of the most iconic structures in Utah, is still a major center of worship for the Latter-day Saint community and a popular tourist attraction.

3. April 6, 1909, saw the opening of the Great Salt Lake Causeway, a railroad and highway causeway that spanned the shallow waters of the Great Salt Lake and connected Salt Lake City to California. The causeway was a major engineering feat and helped to facilitate trade and transportation between Utah and the west coast.

4. In 1917, the US declared war on Germany and entered World War I, mobilizing thousands of Utahns to serve in the armed forces. April 6 of that year marked the first day of draft registration for Utah men between the ages of 21 and 31, many of whom would go on to fight in Europe.

5. April 6, 1973, was a turning point in the history of women's athletics in Utah, as the state became one of the first to pass a comprehensive Title IX law. This legislation required universities and schools to provide equal opportunities for female athletes and helped to provide a foundation for the growth of women's sports in Utah and across the country.