Boston is typically 10.5 hours behind Mumbai. When it's 9:30 PM in Mumbai, it's 11:00 AM the same day in Boston. India uses UTC+5:30, creating the half-hour offset. India does not observe daylight saving time, but Boston does.
During US daylight saving time (March to November), the difference is 9.5 hours. During US standard time (November to March), the difference increases to 10.5 hours.
Optimal meeting window: 7:00 AM - 9:00 AM Boston time (5:30 PM - 7:30 PM Mumbai, or 6:30 PM - 8:30 PM in winter). Morning Boston catches evening Mumbai.
Boston's biotech and pharma industries have strong ties to India. Many Indian pharmaceutical companies have partnerships with Boston-area research institutions.