1. On May 23, 1934, notorious bank robber Bonnie Parker and her partner Clyde Barrow were shot and killed by law enforcement in Bienville Parish, Louisiana. While not a Colorado event, Bonnie and Clyde are a part of popular culture and their criminal exploits include a stop in Colorado.

2. May 23, 1937 was the date of the infamous Denver School Tragedy. An accidental gas explosion claimed the lives of five students and severely injured dozens more during a school play. Today, a plaque and memorial garden honor and remember the victims.

3. On May 23, 1973, the Colorado Supreme Court ruled in favor of Karen Silkwood, a nuclear plant worker who had been contaminated with plutonium. Silkwood's case was instrumental in establishing laws that protect whistleblowers who expose dangerous working conditions and environmental hazards.

4. In 2015, the Colorado Rockies set a MLB record for consecutive home games with a run scored, extending the streak to 32 games on May 23. Unfortunately, the team went on to lose the game to the San Francisco Giants.

5. In 2017, Colorado became the first state in the nation to allow medical marijuana use in schools, thanks to a bill signed into law on May 23. The legislation allows parents or caregivers to administer medical marijuana to students with a valid prescription while on school property.