1. Idaho became a state on August 15, 1890, making it the 43rd state in the United States. The Idaho territory had existed since 1863, but it took a long time for it to meet the requirements for statehood.

2. August 15, 1910, marked the beginning of the Great Fire of 1910, also known as the Big Blowup. The wildfire was the largest in recorded history and burned over 3 million acres in Idaho and Montana. The disaster led to significant changes in wildfire management and firefighting techniques.

3. The Snake River Stampede, one of the largest rodeos in the United States, began on August 15, 1937. The event takes place in Nampa, Idaho, and features professional rodeo competitors from all over the world. It is also the largest single tourist attraction in the Nampa/Caldwell area.

4. On August 15, 1934, the Idaho State Capitol was dedicated in Boise. The iconic building took six years to construct and is listed on the National Register of Historic Places. It features a neoclassical style and is known for its distinctive dome.

5. August 15, 1979, marked the opening of the World Center for Birds of Prey in Boise. The center was established by the Peregrine Fund, an international organization dedicated to the conservation of birds of prey. The center showcases over 200 birds, including eagles, falcons, hawks, and owls, and educates visitors on the importance of raptors in the ecosystem.