Yesterday and today Boulder celebrates holidays include National Peanut Butter and Jelly Day, National Burrito Day, Children’s Picture Book Day, Autism Awareness Day, Walk to Work Day, and National Ferret Day. History of Peanut Butter and Jelly: St. Louis World’s Fair 1904 World’s Fair to WWII Rations The peanut butter and jelly (PB&J) sandwich, an iconic American delicacy, originated in the early 20th century. Peanut butter was introduced at the 1904 St. Louis World’s Fair, but it wasn’t until the 1920s, when peanut butter became widely available, that the... Read More