What is the significance of "Fat Tuesday" in the context of Mardi Gras celebrations?

"Fat Tuesday" is significant in Mardi Gras celebrations because it marks the last day before the Christian season of Lent begins. It is a day of indulgence and feasting before the period of fasting and reflection leading up to Easter. This day is known for extravagant parties, parades, and the consumption of rich foods as a way to celebrate before the solemnity of Lent.