It varies throughout the world
The US one is much later than the British one. And down under seems to be different too.

Edit - I've just checked - the US and Australian days are the same. Here it's the fourth Sunday in Lent.
( K2k6 has a proper job these days, Mon 26 Apr 2010, 8:53, 1 reply, 16 years ago)

I have no idea when lent is but thanks for the heads up. :)

(Poppet some assembly required., Mon 26 Apr 2010, 8:55, Reply)

It varies each year.
It depends on when Easter is, which in turn depends on full moons, what the pope ate for breakfast, and several more obscure factors.
( K2k6 has a proper job these days, Mon 26 Apr 2010, 8:57, Reply)

ahhk. Well I know when easter is :D

(Poppet some assembly required., Mon 26 Apr 2010, 8:59, Reply)