Best overlap: 8:30 AM to 12:30 PM in Manchester is 2:00 PM to 6:00 PM in Mumbai.
Keep meetings inside 8:30 AM to 12:30 PM in Manchester — that maps to 2:00 PM to 6:00 PM in Mumbai. Mumbai is 5.5 hours ahead of Manchester, leaving about 4 hours of daily overlap — enough for most meetings if you don't leave them too late in the day. Because Manchester and Mumbai don't both observe daylight saving, plan to re-check the overlap around March and November.
London to New York is five hours apart, except for the five weeks a year when it isn't. Exact overlap windows for every US zone, the 2026 DST mismatch dates, and where to put the recurring sync. -