1. The first known Mormon pioneer party entered the Salt Lake Valley on February 15, 1846. Led by Brigham Young, the group of more than 1,500 people had completed the long and arduous journey from Nauvoo, Illinois, to what would become their new home in the western frontier.

2. On February 15, 1870, Utah became the second U.S. territory to give women the right to vote, granting the suffrage to all female citizens over the age of 21. This landmark decision followed Wyoming, which had granted women's suffrage in 1869.

3. The Salt Lake Tribune, one of Utah's major newspapers, was founded on February 15, 1871. Over the course of its 150-year history, the Tribune has served as an important source of news and information about the state, covering everything from politics and business to culture and sports.

4. February 15, 1915, marked the start of the Panama-Pacific International Exposition in San Francisco, a world's fair that featured exhibits and pavilions from around the globe. Utah was represented at the fair with its own exhibit, which showcased the state's abundant natural resources and unique cultural heritage.

5. On February 15, 2002, Utah hosted the opening ceremonies of the Winter Olympics in Salt Lake City. The games were widely considered a success, with Utah's beautiful landscapes and internationally renowned ski slopes providing a stunning backdrop for the world's top athletes to compete.