Hmm. Never heard of Shrove Tuesday. Or Pancake Tuesday. I actually only knew of Fat Tuesday because it was the name of a bar, in Baltimore, maybe a chain, in the '80's. Whatever you want to call it, it is the day before Ash Wednesday. I would like to do something or give something up, and I am late on deciding what that will be.
From Wikipedia about Shrove Tuesday:
In the United Kingdom and Ireland, Shrove Tuesday is often known colloquially as Pancake Day or Pancake Tuesday. In the UK and for those who follow the Anglican tradition elsewhere it is known as Pancake Day; in Ireland and other countries following the Catholic tradition it is known as Pancake Tuesday.