Apfelwein Festival (August-September): Celebrates traditional apple wine with music, food, and cultural events. Christopher Street Day (July): Europe's largest LGBTQ+ celebration with parades and festivities. Frankfurt Christmas Markets (November-December): Extensive seasonal markets throughout the city. Book Fair (October): World's largest international book trade fair showcasing publishing. Museumsufer Fest (August): Free entry weekend to all museum embankment institutions. Main River Festival (June): Multi-day celebration along the riverbanks with music and food. Jazz Festival (October): International jazz performances throughout the city.