1. On May 8, 1792, President George Washington signed a bill creating the United States Postal Service, establishing the organization that would deliver letters and packages across the country for generations to come.

2. In 1889, on May 8th, Washington became the 42nd state in the United States.

3. On May 8, 1970, a massive protest against the Vietnam War took place in Washington, D.C. Called the "Mayday Protests," it was one of the largest civil disobedience actions in United States history, with tens of thousands of demonstrators taking to the streets to oppose the war effort.

4. May 8, 1965, holds significance for Washington's aviation history. It was on this day that the first Boeing 727 airliner performed its maiden flight. The plane would go on to become one of the most popular commercial aircraft of all time, revolutionizing air travel in the process.

5. In 2004, on May 8th, the Seattle Mariners retired the number 11 jersey of former player and team icon Edgar Martinez. Martinez played for the Mariners for his entire 18-year career, becoming one of the most beloved and successful players in franchise history. The ceremony took place at Safeco Field (now T-Mobile Park) in Seattle.