Let's make this birthday one to remember.

76 years old (Born on April 18, 1949)

Happy Birthday, Charles Fefferman! May your day be filled with infinite joy and fewer complex equations. Your groundbreaking contributions to mathematical analysis have left us all in awe—though admittedly, most of us still can't quite grasp exactly what you've proven!

From Princeton lecture halls to prestigious awards, your career has been nothing short of legendary. You've tackled problems that would make even calculus professors sweat nervously at the chalkboard. Here's hoping this birthday brings you as much happiness as solving a particularly tricky theorem—or better yet, discovering someone else already solved it for you.

Cheers to another year ahead!