1. Idaho became a state on June 26, 1890. It was the 43rd state to join the United States.

2. The first-ever Gem State Stampede Rodeo was held on June 26, 1929. The event is still held annually in the city of Coeur d'Alene.

3. On June 26, 1959, the iconic Boise State Capitol building was completed. It took almost a decade of construction to finish the building, which is now a popular tourist attraction in the city.

4. In 1988, the U.S. Supreme Court ruled in the landmark case "Cohen v. Cowles Media Co." which originated in Idaho. The case dealt with a journalist's promise of anonymity to a source and the legal consequences of breaking that promise.

5. On June 26, 2015, the U.S. Supreme Court ruled in favor of marriage equality nationwide in the case "Obergefell v. Hodges." This ruling was a significant moment for the LGBTQ+ community in Idaho and across the country.