Delhi is 10.5 hours ahead of Atlanta during US summer (EDT), and 9.5 hours ahead during winter (EST). When it's 9:00 AM in Atlanta, it's 7:30 PM or 8:30 PM in Delhi.
India uses IST (UTC+5:30) year-round and doesn't observe DST.
Optimal window: 7:00 AM - 9:00 AM Atlanta time (5:30 PM - 7:30 PM Delhi). Early morning calls from Atlanta catch evening hours in Delhi.
Air India and connecting flights link Atlanta to Delhi Indira Gandhi International Airport.