Pancake Day was originally a pagan celebration of the changing of seasons, a sort of recognition of the maddening battle this time of year between very cold and beginnings of Spring. Pancakes, in their roundness and warmth, symbolized the sun.
Incidentally, a Bristol-based design firm called Kinneir Dufort has come up with a 3-D printing machine that uses facial recognition technology to print your likeness on a pancake. The system utilizes both the high-tech and the low-tech to mirror your face, combining complex face-recognition and tracking software with the practice of layering strokes of pancake batter onto a hot plate to result in color gradation caused by the varied cooking times of different parts.