Absolutely correct on the cultural & religious connection to Shrove Tuesday:
(From the Wikipedia article on Shrove Tuesday) - “Shrove Tuesday (also known as Pancake Tuesday or Pancake Day) is the final day of Shrovetide, which marks the end of the pre-Lenten season. Lent begins the following day with Ash Wednesday. Shrove Tuesday is observed in many Christian countries through participating in confession, the ritual burning of the previous year’s Holy Week palms, finalizing one’s Lenten sacrifice, as well as eating pancakes and other sweets.[2][3]“
I observe both Pancake Day & Ash Wednesday every year and appreciate the shout out. Today is Friday and many businesses — including fast food chains — have “Fish Fridays” during Lent, or other seafood offerings like lobster bake at discount. So whether you out or at home, enjoy! 🍣🐟🍤