16th June, 1904. Bloomsday

This is the day that Leopold Bloom, a central character in James Joyce's "difficult" (ie weird) novel Ulysses, begins his walk around Dublin. Ulysses is based loosely on Homer's The Odyssey, and divides opinion as to whether it is a) work of genius or b)pretentious tosh ("Man goes for a walk around Dublin. Nothing happens").

There is a neat summary, with reader views for and against, on the BBC website