Here are some interesting facts about national donut day:
The first donut was invented in the Netherlands in the 16th century.
The first donut shop in the United States was opened in New York City in 1847.
The Salvation Army started serving donuts to soldiers during World War I.
The first National Donut Day was celebrated in 1938.
The most popular type of donut in the United States is the glazed donut.
The world's largest donut weighed 2,628 pounds and was made in 2016.