Shakespeare's birthday is (by long etablished tradition) celebrated as 23rd April 1564, (Christened at Holy Trinity Church Stratford 26 April 1564 (The register still exists). Shakespeare also died on St George's day 23 April 1616.
This same date in 1616 is often given as the death of Cervantes (Auth. Don Quixote). And then the claim is made that these two great writers died on the same day.
Unfortunately, this is not the case. Some texts give Cervantes death as 22nd April. And; even if the date was the same, there would have been over a week's difference because Spain adopted the Gregorian calendar long before England did.

Pedantry and useless trivia brought to your screens by: Nigel