Fluffernutter Day is celebrated annually on October 8, promoting the enjoyment of this nostalgic sandwich, especially in New England households.
Said to have been invented by Massachusetts resident Emma Curits in 1918, the gooey treat contains marshmallow spread and peanut butter slathered between slices of white bread.
The term "fluffernutter" was popularized in the 1960s through an advertising campaign for Marshmallow Fluff, and it was only added to the dictionary in 2021.