1. In 1971, the Seattle Seahawks were awarded an NFL expansion franchise on December 27th. The team began playing in 1976 and has been an important part of Washington state's sports culture ever since.

2. December 27, 1847 marks the date when Governor Isaac Stevens ratified the first Constitution of the State of Washington. The document established the principles of government and society in the region and paved the way for Washington's eventual statehood in 1889.

3. In 1904, the Great Northern Railway established a rail connection between the city of Seattle and the town of Leavenworth on December 27th. The town, which was originally a logging community, has since become a popular tourist destination known for its Bavarian-style architecture and picturesque setting.

4. On December 27, 1968, the Tacoma Narrows Bridge (nicknamed "Galloping Gertie") was officially designated as a National Historic Civil Engineering Landmark. The bridge, which famously collapsed in 1940, is hailed as a pioneering feat of engineering and a symbol of the risks inherent in innovative design.

5. In 2003, the Washington State Department of Ecology reached an agreement with the Port of Seattle on December 27th to restore more than 8 acres of land along Puget Sound. The project, known as Terminal 18 Habitat Enhancement, aimed to create a more sustainable and ecologically diverse waterfront area in the city.