International Beer Day is celebrated worldwide on the first Friday in August. The holiday originated in Santa Cruz, California, in 2007 and has since expanded to 207 cities across 50 countries and six continents. Initially observed on August 5, the date was changed in 2012 to accommodate participants' concerns about the following workday. The celebration encourages people to gather with friends and enjoy various beers, often tasting new or rare options and exploring beers from different cultures. Common customs include beer flights, beer pong, happy hours, beer pairings, and giveaways, making beer a central theme in festive events.