Let's make this birthday one to remember.

46 years old (Born on September 26, 1978)

Happy Birthday, Robert Kipkoech Cheruiyot! You're not just aging gracefully—you're pacing yourself perfectly, much like your legendary victories at the Boston Marathon. With multiple wins under your belt (or should we say running shorts?), you've proven that marathons are simply warm-ups for celebrating another year of greatness.

From conquering Heartbreak Hill to sprinting through Rotterdam's Half-Marathon in 2004 with ease and style—you've shown us all how it's done. May this birthday be filled with fewer hills than Boston and more cake slices than marathon miles. Keep inspiring us by outrunning age itself; after all, you're a champion at endurance!