1. Statehood Day: December 9 marks Statehood Day in Washington. In 1889, Washington became the 42nd state to join the United States.

2. Mount Rainier National Park: On December 9, 1899, President William McKinley established Mount Rainier National Park. The park is located in Pierce County, Washington and is known for its snowy peaks, waterfalls, and forests.

3. Boeing Company: The Boeing Company was founded in Seattle, Washington on December 9, 1916. The company started as a small airplane manufacturer and now is one of the largest aerospace companies in the world.

4. WTO Protests: On December 9, 1999, Seattle was the site of massive protests against the World Trade Organization (WTO). The protests were focused on globalization and economic inequality, and led to widespread clashes between protesters and police.

5. The Great Washington Fire: On December 9, 1889, the Great Washington Fire destroyed much of downtown Seattle. The fire started in a cabinet factory and quickly spread to nearby buildings, causing an estimated $10 million in damages.