What annoys me about Fat Thursday and doughnuts? Absolutely nothing. THEY ARE AWESOME!
If you don't know what Fat Thursday is, check this part of the Wikipedia article about that holiday:
Fat Thursday (German Fetter Donnerstag, Schmotziger Donnerstag, or in areas where carnival is celebrated Weiberfastnacht; Greek Τσικνοπέμπτη (Tsiknopempti) ; Polish Tłusty czwartek) is a traditional Polish, Greek and German feast marking the last Thursday before Lent and is associated with the celebration of Carnival. Because Lent is a time of fasting, the next opportunity to feast would not be until Easter. It is similar to, but should not be confused with, the French festival of Mardi Gras ("Fat Tuesday"). Traditionally it is a day dedicated to eating, when people meet in their homes or cafés with their friends and relatives and eat large quantities of sweets, cakes and other meals forbidden during Lent. Among the most popular all-national dishes served on that day are pączki or berliner, fist-sized donuts filled with rose marmalade, and faworki, French dough fingers served with lots of powdered sugar.