wtf is shrove tuesday i'm from the uk, and i've never heard of it.
I only heard of it from a Red Dwarf sketch. Can't find the vid on YouTube but Rimmer is complaining how arbitrary it is to ask for help by saying "May Day" & he starts radioing, "Christmas Day! Boxing Day! Shrove Tuesday!"
Lister: "It's French ya pillock!"
Same as Fat Tuesday/ Pancake Day/ Mardi Gras, apparently, & your people seem to favor something called a "festy cock" of all things. I'm not going any further with that one.
http://en.wikipedia.org/wiki/Shrove_Tuesday