Shrove Tuesday is the last day of indulgence before Christians traditionally move into a 40-day period of abstinence that marks the lead up to Easter.
It takes its name from the word "shrive", meaning to confess and seek absolution.
In many parts of the world, it is also known as Pancake Tuesday, a tradition borne out of households cooking pancakes the day before Lent begins.
Fats, eggs and milky foods once counted among the items observant Christians wouldn't eat during Lent. Pancakes were a dish that could use up all these items - just add flour.
This year's Shrove Tuesday falls on February 28 ahead of Easter Sunday on April 16.