Let's make this birthday one to remember.

66 years old (Born on February 23, 1959)

Happy Birthday, Clayton! They say age is relative, especially when you've orbited Earth aboard legendary shuttles like Atlantis and Discovery. You've boldly soared into space four times, defying gravity and probably reminding astronauts everywhere what true engineering looks like in action.

From mastering zero-G maneuvers to pulling off some stellar missions for NASA—each adventure brighter than the last—you've effortlessly inspired countless people below to dream big. So here's hoping your birthday celebration is out of this world! Just remember: birthdays on Earth have cake and candles—birthdays in space have floating M&Ms—and both require epic wish-making skills!