Known in exuberant communities as "Mardi Gras" (Fat Tuesday) a day to enjoy fatty foods before the Lenten Fast, or as "Carnival" (farewell to meat) for the same reasons.
In more austere places it is "Shrove Tuesday", a day to be shriven (absolved) from sin before the austerities of Lent.
In the U.K. and Commonwealth countries it has the more prosaic and practical name of "Pancake Day", or "Pancake Tuesday" (using up eggs and fat before Lent). ** More about this below.
I should have eaten a wonderful Rib Eye steak today with its delicious fatty veins, perhaps with chips (French Fries) cooked in Lard.
Instead I made a more restrained batch of Black Bean soup (with pearl onions).