Let's make this birthday one to remember.

87 years old (Born on January 10, 1938)

Happy Birthday, Donald Knuth! May your day be filled with joy and laughter—just like the countless programmers who've chuckled (or cried) while navigating "The Art of Computer Programming." Your meticulous attention to detail has inspired generations; rumor has it even bugs fear you!

From pioneering algorithms to revolutionizing typesetting with TeX, you've elegantly debugged life's complexities. Stanford's halls still echo tales of students bravely tackling your legendary exercises. Today we celebrate not just another year older—but another iteration wiser.

Here's wishing you infinite loops of happiness without stack overflow errors. Cheers to a timeless genius whose legacy compiles flawlessly every time!