Lot's of people see Shrove Tuesday (Fat Tuesday, Mardi Gras) as a party and a parade and nothing more.
This one night of debauchery is rooted in the pending lenten season and its ritual of fasting. Giving something up for lent.
I'm not Catholic. I do not celebrate Lent. I do, however, see the benefits of occasional fasting.
Go ahead and party it up tonight, if you must. But do so with intention and awareness. Maybe give some thought to a few weeks of fasting. Give up something unhealthy. Just a thought.