Shouldn’t his birthday be celebrated on March 31? Some of the German states had switched to the Gregorian calendar even before he was born, although I assume he was born in one of the states still using the Julian calendar, but the changeover in those states took place in his lifetime. We celebrate Washington’s birthday on February 22 even though he was born before the British Empire changed to the Gregorian calendar (he was born on Feb. 11, O.S.).
That’s a good question. I was just going by the History Channel.