1. On May 10, 1869, the Union Pacific and Central Pacific Railroads were linked at Promontory Summit, Utah, completing the country's first transcontinental railroad. This historic event had a significant impact on the development of Idaho, making transportation easier and allowing for greater economic growth.

2. May 10, 1882, is the birth date of famous Idahoan composer and music educator Clarence Burg. Burg was born in Rigby and went on to compose over 300 works and teach at institutions such as Boise State University and the University of Idaho.

3. On May 10, 1972, Idaho Senator John Melcher introduced the Wilderness Act to the Senate, which would protect the state's wilderness areas from development and maintain their natural beauty for generations to come.

4. May 10, 1928, was the day the Whiz Kids of Boise High School won the National High School Championship in debate, beating 1,200 other schools. The team consisted of five students who had only a few months to prepare for the competition.

5. In May 10, 1890, Idaho became the 43rd state to join the Union. This day is celebrated as Idaho Day, a holiday to commemorate the state's rich history and culture. It is a day for Idahoans to come together and celebrate the state's unique identity and contributions to the country.