1. In 1879, the first telephone exchange in Utah was established in Salt Lake City. The exchange was owned by the Rocky Mountain Bell Telephone Company and had just 25 customers.

2. On March 21, 1923, the legendary Utah Jazz player, Karl Malone, was born in Summerfield, Louisiana. Malone played for the Utah Jazz for 18 seasons and was a two-time NBA MVP.

3. In 1933, Utah's Zion National Park was established. The park is known for its stunning sandstone cliffs, canyons, and waterfalls.

4. On March 21, 1967, The Salt Lake Tribune became the first newspaper in Utah to use satellite transmission technology to transmit news stories and photographs from Utah to the East Coast.

5. In 1989, Robert Redford opened his Sundance Resort in Utah's Provo Canyon. The resort is known for its world-class skiing, hiking, and mountain biking, as well as its commitment to environmental sustainability.