Yes, Shakespeare April 23rd, Also St George (in England where he's patron saint)
Elsewhere in Europe his day is 5 May (Eastern Orthodox) and as he's not from England, their choice of date is equally acceptable.
I first became aware of this reading Dracula (Chapter 1)

Also 23 April would probably equate to 5 May if we hadn't chopped 11 days out of our calendar in 1752.