Although the birthday of Snoopy, the beagle from the comic strip “Peanuts” is celebrated on a few different dates, August 10 has become his official birthday based on strips that ran from August 8–10, 1968. So, when exactly is Snoopy’s birthday? Even though it is officially celebrated on August 10, the exact date of our favorite beagle’s big day remains something of a minor mystery. Sometimes even Snoopy can’t remember when he was born. And, of course, if you were to ask Snoopy, every day would be his birthday!