The National Earmuff Day shirt marks March 13th, the calendar day honoring Chester Greenwood, the teenager who invented earmuffs in Farmington, Maine back in 1873. From a simple childhood fix for cold ears to a worldwide winter essential, earmuffs have a quirky inventor's story worth celebrating. This tongue-in-cheek shirt is a tribute to one of winter's most underrated accessories. It makes a fun gift for history buffs, cold-weather workers, ski lift operators, and anyone with a sense of humor about strange holidays. Wear it on winter weekends, at trivia night, or to the next snowy gathering. ThreadSquad custom prints every shirt using direct-to-garment technology so the design lasts. Pay shipping on your first item and every additional shirt in the same order ships free.