Peanut Butter and Chocolate Day is observed in the United States every year on July 23. This holiday celebrates the popular combination of peanut butter and chocolate, which has its roots in the Americas, with peanuts native to South America and cacao from Mesoamerica. The pairing became popular in the early 20th century, leading to the creation of iconic treats such as Reese’s Peanut Butter Cups, invented in 1928, and other products like Butterfinger and Crispy Crunch. People celebrate by enjoying various peanut butter and chocolate treats, which can include sandwiches, cookies, cupcakes, and even homemade candies like Buckeyes. Many also experiment with new recipes or host potluck-style parties. Social media plays a role in the celebration, with participants encouraged to share their festivities using the hashtag #PeanutButterAndChocolateDay.