Let's make this birthday one to remember.

82 years old (Born on December 11, 1942)

Happy birthday to the ever-intriguing Derek Parfit! May your special day be filled with cake, laughter, and perhaps another existential revelation about personal identity. After all, birthdays are just socially constructed dates—though we delightfully accept this illusion when there's a chance for cake.

Your profound exploration of ethics and rationality has left us scratching our heads yet strangely entertained. Recently rereading your groundbreaking 'Reasons and Persons,' we still debate whether we're really ourselves or rather cleverly disguised philosophical experiments. Either way, you've truly succeeded in making philosophy as timeless—and confounding—as ever! Here's to another year challenging reality itself!