Planning your trip for America’s 250th birthday? Philadelphia is the center of the Semiquincentennial, and the two‑week stretch from June 20–July 10, 2026 is packed with concerts, fireworks, museum exhibitions, neighborhood festivals, and waterfront celebrations. This curated, day‑by‑day guide highlights the best events across the city — plus insider suggestions for experiencing the Semiquin like a local. Bookmark this page and check back often as new Philadelphia 250 events and details are added.