for those who has no idea what pancake tuesday is, here is something I quote from http://www.littlefallschurch.org/Lent2005Pancake.shtml

The Tuesday before Lent is celebrated across the world in a variety of ways. This holiday is also known as Mardi Gras (literally "fat Tuesday" in French), Carnival (from the Latin for "farewell to the flesh"), Fasnacht (the Germanic "night of the fast"), and Shrove Tuesday. The latter name comes from the word "shriven." To shrive someone, in old-fashioned English, is to hear his acknowledgment of his sins, to assure him of God's forgiveness, and to give him appropriate spiritual advice.

On Shrove Tuesday, many Christians make a special point of self-examination, of considering what wrongs they need to repent, and what amendments of life or areas of spiritual growth they especially need to ask God's help in dealing with.

For centuries, Christians have celebrated Shrove Tuesday with a pancake feast. Why pancakes? The idea is to use up all the fats and other dairy products before the beginning of Lent, when such ingredients were traditionally forbidden according to the dietary rules once observed during the forty days of Lent. Since pancakes are a standard way of using up fat, the day is also called Pancake Tuesday.