Shrove Tuesday is a holiday in which the christian has ash put on their head in the shape of a cross the United Kingdom, Canada, The United States and Australia for the day before Ash Wednesday. Ash Wednesday is the first day of the Christian season of prayer and fasting called Lent.
On Shrove Tuesday people traditionally cook and eat pancakes. The reason for this was to use up foods such as fat, eggs and milk before Lent.
In some cultures it has close ties with Mischief night.