When it comes to royal birthdays, September 15 is one day full of celebrations across Europe and the United States alike. And while three famous royals were all born on the same day, they also share a penchant for living out their roles on their own terms.
Prince Harry—who will celebrate his 40th birthday on Sunday, Sept. 15—might be the most well-known of the trio when it comes to breaking the royal rulebook, but he shares his special day with both a queen and a future prince consort who have paved their own paths.
