1. Idaho became a state on January 14, 1890: This is the most significant event in Idaho's history associated with January 14. Idaho officially became the 43rd state in the USA on this day.

2. Idaho celebrated its first-ever Martin Luther King Jr. holiday in 1986: Martin Luther King Jr. Day was signed into law as a federal holiday in 1983. It took a few years for all states to celebrate the holiday. Idaho recognized Martin Luther King Jr. Day as a state holiday in 1990.

3. The first winter ascent of Mount Borah was on January 14, 1957: Mount Borah is Idaho's tallest mountain peak. The first winter ascent of the peak was on January 14, 1957, by a team of six climbers.

4. The University of Idaho was established on January 14, 1889: The University of Idaho is Idaho's oldest public university. It was established on January 14, 1889, by an act of the state's Territorial Legislature.

5. Galeazzo Ciano, an Italian diplomat, visited Idaho Falls on January 14, 1937: Galeazzo Ciano was the Italian foreign minister and Benito Mussolini's son-in-law. He visited Idaho Falls to see the town's new municipal airport, which was then considered one of the most modern airports in the world.