1. On February 6, 1889, Washington became the 42nd state in the United States. This was after a long and contentious process that began with the Oregon Territory's creation in 1848.

2. On February 6, 1919, the Washington State Legislature approved the establishment of the University of Washington School of Nursing. The school would become one of the top nursing schools in the country in the following years.

3. On February 6, 1976, Seattle's tallest building at the time, the 76-story Columbia Center, completed construction. It stood as the tallest building west of the Mississippi River until 1982.

4. On February 6, 2008, the NBA's Seattle SuperSonics announced that they would be moving to Oklahoma City. This was a significant blow to the city, which had been home to the team since 1967.

5. On February 6, 2014, the Washington State Senate passed a bill legalizing same-sex marriage. This made Washington the 9th state to legalize same-sex marriage, following a wave of state-level action on the issue in the early 2010s.