National Donut Day - celebrated in the United States, is on the first Friday of June of each year, succeeding the Doughnut event created by The Salvation Army in Chicago in 1938 to honor those of their members who served doughnuts to soldiers during World War I. (source: Wikipedia)
You can download a 2 Colors Donut for 3D printers with 2 nozzles. Created for National Donut Day by FilamentOne.
STL Source: https://www.thingiverse.com/thing:2359632
Printer: Ultimaker 3