1. Flag Day: On June 14th, 1777, the Continental Congress adopted the first version of the United States flag. In 1916, President Woodrow Wilson proclaimed June 14th as Flag Day, and in 1949, National Flag Day was established by an Act of Congress.

2. Seattle Space Needle: On June 14th, 1962, the Seattle Space Needle opened to the public. The 605-foot tall structure was built for the 1962 World's Fair, and remains one of the most iconic landmarks of the Pacific Northwest.

3. First Boeing 747: On June 14th, 1970, the first Boeing 747 was rolled out of its assembly plant in Everett, Washington. Nicknamed the "Queen of the Skies," the 747 became the world's first jumbo jet and revolutionized air travel.

4. Mount St. Helens Eruption: On June 14th, 1980, the Mount St. Helens volcano in southwestern Washington erupted, causing the deadliest and most destructive volcanic event in U.S. history. The eruption killed 57 people, destroyed more than 200 homes, and caused billions of dollars in damage.

5. Father's Day: In 1910, Sonora Smart Dodd of Spokane, Washington, proposed the idea of a day to celebrate fathers. Her father, a Civil War veteran, had raised six children on his own after his wife died, and Dodd wanted to honor his devotion to his family. The first Father's Day celebration was held in Spokane on June 19th, 1910, and eventually became a national holiday celebrated on the third Sunday in June.