But people get pretty excited about it, so I accepted a slice of King's Cake at work.
A king cake (sometimes rendered as kingcake, kings' cake, king's cake, or three kings cake) is a type of cake associated with the festival of Epiphany in the Christmas season in a number of countries, and in other places with the pre-Lenten celebrations of Mardi Gras / Carnival. It is popular in the Christmas season (Christmas Eve to Epiphany) in France, Belgium and Switzerland (''galette'' or gâteau des Rois), Portugal (bolo rei), Spain and Spanish America (roscón or rosca de reyes and ''tortell'' in Catalonia), Greece and Cyprus (''vasilopita'') and Bulgaria (banitsa). In the United States, which celebrates Carnival mainly in the Southeastern region (Louisiana and New Orleans in particular), it is associated with Mardi Gras traditions.
The cake has a small trinket (often a small plastic baby, sometimes said to represent Baby Jesus) inside, and the person who gets the piece of cake with the trinket has various privileges and obligations (such as buying the cake for the next celebration). -- Wikipedia
I remembered just enough of this before I bit into it to avoid swallowing the Baby Jesus trinket that I found inside. I heard people asking around who found it, but as the only "benefit" I knew of was the responsibility to buy the cake next year, I haven't mentioned it yet.