Sydney is typically 5.5 hours ahead of Mumbai. When it's 3:00 PM in Sydney, it's 9:30 AM the same day in Mumbai. India uses UTC+5:30, creating the half-hour offset. India does not observe DST, but Sydney does.
During Australian daylight saving time (October to April), the difference is 5.5 hours. During Australian standard time (April to October), the difference is 4.5 hours.
Optimal meeting window: 1:00 PM - 5:00 PM Sydney time (7:30 AM - 11:30 AM Mumbai, or 8:30 AM - 12:30 PM in winter). Afternoon Sydney catches morning Mumbai.
Australia has a large Indian diaspora, and business ties between Sydney and Mumbai are growing in IT, education, and mining. Cricket matches between the two nations are major cultural events.