1. In 1956, the Washington State Ferry system, known as the largest ferry system in the United States, began operating between Seattle and Bainbridge Island on July 18th.

2. On July 18, 1968, the Boeing 737 made its first test flight in Seattle, Washington. The aircraft has since become one of the most successful and widely used commercial airplanes in history.

3. The Washington Senators played their last game before moving to Texas on July 18, 1971, marking the end of baseball in Washington, D.C. until the arrival of the Washington Nationals in 2005.

4. In 1984, the Summer Olympics torch passed through Seattle on July 18th, with numerous events and celebrations held throughout the city in honor of the event.

5. On July 18, 1996, the Pike Place Market Historical District was added to the National Register of Historic Places, recognizing it as one of the most beloved and vibrant destinations in the city of Seattle.