Petaluma Butter & Egg Days is an annual festival held in Petaluma, California, celebrating the region's rich agricultural history, particularly its dairy and poultry industries. The event typically features a parade, live music, and various activities for families, showcasing local businesses and artisans. The festival began in 1986 and has grown to include a variety of attractions, such as a petting zoo, craft booths, and food vendors. It aims to promote community spirit and highlight the importance of California's farming heritage, making it a beloved event for both locals and visitors alike.