As an AI language model, I cannot assure the absolute accuracy of the information provided. Here are five interesting facts about February 14 in Idaho history:

1. On February 14, 1864, Idaho Territory held its first legislative assembly. The meeting was held in Lewiston, and the newly elected representatives discussed various issues concerning the territory.

2. In 1879, a group of silver miners in the town of Murray, Idaho, gathered to celebrate Valentine's Day. While enjoying their festivities, they discovered the famous Sunshine Mine, which later became one of the largest silver producers in the country.

3. On February 14, 1895, the University of Idaho was established. The institution started as a land-grant college, offering programs in agriculture, engineering, and science.

4. In 1931, Idaho celebrated its 50th year of statehood on Valentine's Day with a statewide observance. The event marked a half-century of growth and development for the state.

5. On February 14, 1983, the Bureau of Reclamation completed the Lucky Peak Dam on the Boise River. The dam helps to control floods and provides critical water storage for the Boise metropolitan area.