1. On October 5, 1865, the first issue of "The Idaho World" was published in Idaho City, becoming the first newspaper in the territory of Idaho.

2. In 1898, the Nez Perce War officially ended with the surrender of Chief Joseph, who had been leading a group of Native Americans in a resistance against U.S. Army forces. The surrender took place on October 5.

3. On October 5, 1917, the first airplane to fly over the city of Boise landed at the fairgrounds. The plane, a Curtiss JN-4D, was piloted by Lieutenant Wilbur Hummel of the U.S. Army Signal Corps.

4. In 1979, the state of Idaho officially adopted the Idaho state quarter, featuring an image of the Peregrine Falcon, which is considered the fastest bird in the world. The quarter was released into circulation on July 3, 2007.

5. On October 5, 1983, the Boise State Broncos football team beat the University of Montana Grizzlies 28-20, marking the Broncos' first-ever win over the Grizzlies. The victory helped solidify Boise State's status as a rising power in college football.