Rome is 3.5 hours behind Chennai
Best overlap: 11:30 AM to 6:30 PM in Chennai is 8:00 AM to 3:00 PM in Rome.
Book within 11:30 AM to 6:30 PM Chennai time (8:00 AM to 3:00 PM in Rome) and both teams will be at work. Rome is 3.5 hours behind Chennai, but with 7 hours of common ground you can hold morning or afternoon meetings without anyone working odd hours. Daylight saving complicates things slightly: Rome observes it, Chennai doesn't, so the difference flexes by an hour part of the year.