1. On September 29, 1962, the Seattle World's Fair ended its six-month run with a record-breaking attendance of over 9 million visitors. The fair featured notable attractions such as the Space Needle, Monorail, and the Bubbleator.

2. The Great Seattle Fire of 1889, which destroyed much of the city's downtown area, started on September 28 and continued to burn on September 29. The fire transformed the city's architecture, as many buildings were reconstructed with brick and stone instead of wood.

3. In 1907, the Washington State School for the Blind opened in Vancouver on September 29. The school provides education and support for students with visual impairments.

4. On September 29, 1913, Seattle's public library system opened its first branch, the Ballard branch, which is still in operation today. The library system has since expanded to 27 locations throughout the city.

5. The Hanford Site, a U.S. Department of Energy reservation in southeastern Washington that produced plutonium for nuclear weapons during World War II, was officially established on September 29, 1943. The site played a significant role in the Manhattan Project and continued to produce nuclear materials until its closure in 1987.