Bison-ten Yell Day is celebrated on September 2 and is a whimsical holiday that plays on the phonetic similarity between "Bison-ten Yell" and "bicentennial." This day honors an imaginary figure's 200th birthday and the concept of verbal signaling in military tactics. Observed in the United States, the holiday encourages participants to share good-natured yells and engage in playful activities. While it is not a major retail holiday, some brands, such as Buffalo Wild Wings and Jack Link's, may offer promotions related to bison-themed items or 'loud' flavors. Social media is utilized to celebrate the day, with individuals and brands encouraged to share videos, jokes, and creative graphics that highlight the holiday's humorous origins and wordplay.