Chennai is 9.5-10.5 hours ahead of New York. New York uses Eastern Time (EST/EDT, UTC-5/-4) while Chennai uses Indian Standard Time (IST, UTC+5:30). During standard time, Chennai is 10.5 hours ahead; during daylight saving time, Chennai is 9.5 hours ahead.
India does not observe daylight saving time, so the difference varies seasonally.
Best calling time: 8:30 PM - 10:30 PM New York time. This corresponds to morning hours in Chennai (6:00 AM - 8:00 AM). Evening calls from New York work best for business hours overlap.
New York and Chennai have strong business connections, particularly in IT services and outsourcing. Chennai is a major tech hub in India, and many US companies have operations there.