1. On February 16, 1918, The Idaho Legislature passed a bill that granted women the right to vote in primary elections. This was significant as it paved the way for women's suffrage in Idaho and set a precedent for similar bills to be passed in other states.

2. In 1866, the Boise News newspaper was first published in Idaho. The newspaper was an important source of news and information for the state for over 100 years before it eventually ceased publication in 1975.

3. On February 16, 1939, Idaho Governor Barzilla Clark signed into law the "Idaho Sunday Closing Law". This law required all businesses except for those deemed "essential", such as hospitals, to close on Sundays. The law remained in effect until 1984, when it was repealed by the Idaho Legislature.

4. In 1943, the Idaho National Laboratory (INL) was established near Idaho Falls. The INL is a national research laboratory that conducts research in nuclear energy, national security, and environmental science.

5. February 16, 1957, saw the premiere of "This is Idaho", a television program that showcased the state's industries, natural resources, and attractions. The program was produced by the Idaho State University and aired throughout the state for several years.