1. On May 4, 1970, four students were killed and nine others were injured when National Guard troops opened fire on a group of protesters at Kent State University in Ohio. While this event did not occur in Oregon, it remains a significant moment in U.S. history and had a ripple effect on many campuses across the country, including in Oregon.

2. May 4, 1859, marks the day that Oregon was admitted as the 33rd state in the Union. At the time, Oregon's population was relatively small and concentrated mostly in the Willamette Valley.

3. On May 4, 1971, the Oregon State Legislature passed the Bottle Bill, which required a 5-cent deposit on all beer and soft drink containers. This was the first such law in the nation and has since been credited with dramatically reducing litter and increasing recycling rates in the state.

4. May 4, 2007, was the day that a group of environmental activists known as "tree sitters" descended from their perch atop a 600-year-old tree in the Elliott State Forest in southwestern Oregon. The activists had been occupying the tree for more than six months in protest of plans to log the forest.

5. On May 4, 2015, the Oregon Ducks football team unveiled a new uniform design that featured the school's signature green and yellow colors on a "volt" background. While this may not seem like a significant event in Oregon history, the uniform redesigns of the Oregon Ducks football team have become a major cultural phenomenon and often generate national attention.