1. On October 23, 1983, the Washington Redskins defeated the Dallas Cowboys 31-10 in a Monday Night Football game that became known as the "Replacement Game." The game featured replacement players due to a strike by the NFL Players Association.

2. In 1974, President Gerald Ford visited Spokane, Washington on October 23 to participate in a campaign rally for Republican congressional candidates. It was his first visit to the state as president.

3. On October 23, 2001, the Seattle City Council approved plans for the construction of the Northwest African American Museum. The museum celebrates the history and culture of African Americans in the Pacific Northwest.

4. In 1941, workers at the Hanford Engineer Works in eastern Washington began construction on the world's first large-scale nuclear reactor. The project was part of the Manhattan Project, which developed the atomic bomb during World War II.

5. On October 23, 1993, the Space Needle in Seattle celebrated its 31st anniversary with a fireworks display. The Space Needle was built for the 1962 World's Fair and has become a symbol of the city.