I have just two observations:
- If it is only in the UK and Ireland it isn't WORLD Book Day is it!
Apparently the rest of the world celebrates World Book Day on 23 April — which is Shakespeare's birthday, and hence a much more appropriate day. But of course we can't do that because (a) it might clash with Easter holidays when children (at whom this is largely aimed) aren't in school and (b) it is St George's Day (which never mattered to the English before).
- And anyway, who knew? I'm a book-o-phile, and I didn't know. Which shows just how well publicised it has been.