Use Muslim Pro / Athan apps for accurate prayer times in Boston — June daylight is long, with sunrise around 5:08am and maghrib near 8:25pm at solstice.
For halal certification, look for "Zabiha Halal" — the strictest US designation. Sufra Mediterranean and Tarboosh are both confirmed 100% halal across the menu. Black Seed and Shawarma Shack are halal-certified; Man-O-Salwa is halal-friendly (verify proteins at order).
Gillette Stadium has a multi-faith chapel — ask Guest Services on arrival for current World Cup procedure. Plan to pray pre/post stadium when possible — service attendant times during matches may be limited.
Friday matches: Boston-area mosques run Jumu'ah ~1:00–1:30pm. ISBCC has multiple sessions; ISB Cambridge has one. Both reachable within 30 min from downtown.
Boston hotels generally provide prayer mats on request — ask at front desk during check-in. Hilton, Marriott, Hyatt, Omni, and JW chains are reliable.
Halal-dense neighborhoods worth a special trip: Cambridge (Central / Inman Squares — Lebanese, Algerian, Pakistani), Allston / Brighton (BU/BC student halal), Somerville / Davis Sq (Pakistani-Indian halal grocers and grills), Roxbury / Mission Hill (around ISBCC — Somali, Senegalese, Yemeni).