not that many countries take as much pride in the success of their writers. Can you imagine a special day devoted to the celebration of, say, Victor Hugo, or Sartre? I can't either.
Here, it is called Bloomsday, after James Joyce's hero, but there are also many public manifestations about Oscar Wilde, George Bernard Shaw or Jonathan Swift, all of whom I strongly prefer over the author of Dubliners and Ulysses.
NB: Let's not forget Yeats, Samuel Beckett, or Bram Stoker...
NB': Scotland has quite the same thing with Burns' Night honoring Robert Burns and haggis.