The Midwinter Fair was held in Golden Gate Park from January 27 to July 5, 1894. Conceived of and spearheaded by Michael H. deYoung (publisher of the San Francisco Chronicle), who had been a commissioner at the 1893 Columbian Exposition in Chicago -- he decided to capitalize on the momentum of that giant fair by having many of the exhibitors/performers/concessions come straight to San Francisco when they left Chicago. All this made up a portion of the fair, but much new was added as well, with a decidedly California focus. De Young rallied the city (and nation) and was able to get the funding and approvals in record time, allowing the Midwinter Fair to open just a couple months after the closing of the Columbian Exposition.
San Francisco has not done much to commemorate this world's fair, however it's quirky charm is worth remembering.