London Bridge and its riverside environs host a calendar of major annual events drawing millions:
When: Two weekends in July
What: Free outdoor festival celebrating the area's history and culture. Live music stages, street performers, food markets, artisan crafts, family activities. Centered on The Scoop (amphitheater) and More London Estate.
When: December 31/January 1
What: London's flagship fireworks display launched from barges on the Thames near the London Eye. London Bridge provides prime viewing. Ticketed (since 2014) for crowd control. 100,000+ spectators; broadcast globally.
When: Throughout September
What: Month-long river celebration: illuminated night walks, boat races (Great River Race), concerts, art installations, mudlarking walks, talks, children's activities. Events span 42 miles of tidal Thames.
When: April (typically 3rd Sunday)
What: World's largest annual fundraising event (~45,000 runners). Course: Greenwich Park → Tower Bridge → Canary Wharf → **London Bridge** → Embankment → Parliament Square → The Mall (Buckingham Palace finish). Bridge crossing is a iconic moment ~mile 12.
June 3, 2012: 1,000-boat flotilla on Thames—largest in 350 years. Royal barge *Spirit of Chartwell* led procession past London Bridge. 1.2M riverside spectators; billions televised.