Your recruiter writes "let's do 11 a.m. Eastern" and you are in Bengaluru, doing arithmetic that ends in a half hour you don't quite trust. India Standard Time sits 10.5 hours ahead of EST, and 9.5 hours ahead once New York moves to daylight time between March 8 and November 1, 2026. That is why 7 p.m. in New Delhi is 8:30 a.m. in New York rather than a round 8 or 9. The clocks above run live in both cities, the converter takes any time on any date, and the chart lays out the full day.
What People Convert IST to EST For
Standups scheduled in New York, attended from India
A 9 a.m. Eastern standup lands at 6:30 p.m. in Bengaluru while New York is on daylight time, and 7:30 p.m. once the clocks fall back. Same invite, same recurring calendar entry, an hour of your evening either way. Teams that split the difference tend to park daily calls between 9 and 11 a.m. Eastern, which keeps the Indian side inside a normal evening.
Interviewing with US companies from India
Recruiters quote Eastern time and rarely say EST or EDT. An 11 a.m. Eastern interview is 8:30 p.m. in Mumbai during daylight time and 9:30 p.m. in winter — the difference between dinner and after dinner. A loop advertised as 10 a.m. to 3 p.m. Eastern runs 7:30 p.m. to 12:30 a.m. IST in summer. Convert the actual date before promising availability.
US visa appointments booked from both sides
Consulate slots in New Delhi, Mumbai, Chennai, Hyderabad, and Kolkata are published in IST, but the family member helping with the booking is often in New Jersey. A 9 a.m. IST appointment is 11:30 p.m. the previous evening in New York during daylight time, 10:30 p.m. in winter. The date rolls backwards, which is the kind of thing a chart settles faster than a phone call.
Watching the US market open from Mumbai
The New York Stock Exchange opens at 9:30 a.m. Eastern, which is 7 p.m. IST during daylight time and 8 p.m. after the November change. The 4 p.m. Eastern close arrives at 1:30 a.m. IST, or 2:30 a.m. in winter. US inflation prints released at 8:30 a.m. Eastern hit Indian screens at 6 p.m. or 7 p.m. The whole session slides an hour twice a year.
NRI families calling in both directions
Parents in Pune reaching for the phone at 8 p.m. IST catch a child in Boston at 10:30 a.m. while New York is on daylight time, 9:30 a.m. once it is not — mid-morning and awake either way. The same call placed at 8 a.m. IST arrives at 10:30 p.m. the night before in summer, 9:30 p.m. in winter. Sunday calls are the usual casualty: 10 a.m. Eastern is 7:30 p.m. IST in summer and 8:30 p.m. in winter, so dinner moves without anyone deciding it should.
On-call handoffs and follow-the-sun support
A Bengaluru shift wrapping at 6:30 p.m. IST hands over at 9 a.m. Eastern in summer and 8 a.m. in winter. Rotations written as fixed IST blocks drift an hour against their US counterpart twice a year, which is how a support desk ends up with a silent stretch on a Monday morning. Pin the handoff to one zone, then convert the other.
Deadlines quoted in Eastern time
Graduate applications, US grant portals, and journal submission systems routinely close at 11:59 p.m. Eastern. From India that is 9:29 a.m. IST the next morning during daylight time, and 10:29 a.m. in winter. The date on the deadline is not the date on your calendar, and the minute is not round. Submitting on what feels like the correct Indian day is how people miss by half a day.
How the Conversion Works
Nothing here adds a fixed 10.5 hours. The page asks your browser's IANA timezone database for the real offset of Asia/Kolkata and America/New_York at the exact instant you pick. Kolkata answers UTC+5:30 every time, because India has no daylight saving to apply. New York answers UTC−5 or UTC−4 depending on where the chosen date falls relative to March 8 and November 1, 2026. The gap falls out of that subtraction, so it comes back as 10.5 or 9.5 hours exactly as the date requires. Everything runs locally; nothing you type leaves the browser.
Frequently Asked Questions
How many hours ahead is IST of EST?
Ten and a half hours. India Standard Time is UTC+5:30 and Eastern Standard Time is UTC−5, so New Delhi runs 10.5 hours ahead of New York. When New York switches to Eastern Daylight Time at UTC−4, the gap narrows to 9.5 hours. In 2026 that shorter gap runs from March 8 to November 1, and the wider gap covers the rest of the year.
What time is 7 p.m. IST in EST?
8:30 a.m. Eastern Standard Time, the same calendar day. If the date falls inside daylight saving — March 8 through November 1 in 2026 — then 7 p.m. IST is 9:30 a.m. EDT instead. Both answers land on the half hour because India's offset ends in :30 and New York's does not, so any round hour in Delhi arrives as a half hour in New York. It runs the other way too: the 9:30 a.m. Eastern market open is a round 7 p.m. IST in summer and 8 p.m. in winter.
When does the IST to Eastern gap change in 2026?
Twice, and both dates are American ones. On Sunday March 8, 2026, New York springs forward at 2 a.m. local, which is 12:30 p.m. IST that same afternoon; the gap drops from 10.5 to 9.5 hours and every US meeting starts arriving an hour earlier in India. On Sunday November 1, 2026, clocks fall back at 2 a.m. EDT, which is 11:30 a.m. IST; the gap widens to 10.5 again and US meetings shift an hour later.
Is New York on EST or EDT, and does the difference matter?
It matters by a full hour. New York uses EDT (UTC−4) from March 8 to November 1, 2026, and EST (UTC−5) from November 1 until the second Sunday of March 2027. People write "EST" year-round out of habit, so a July invite marked 5 p.m. EST almost certainly means 5 p.m. EDT — 2:30 a.m. IST rather than 3:30 a.m. Trust the date, not the abbreviation.
Does India observe daylight saving time?
No. India Standard Time has been a fixed UTC+5:30 for decades, with no seasonal change and a single zone stretching from Gujarat to Arunachal Pradesh. Every shift in the IST-to-Eastern gap comes from the American side. That also means an event pinned to an IST clock time never moves in India, but moves twice a year for anyone watching it from New York.
What is a workable meeting window between India and the US East Coast?
Roughly 8:30 a.m. to 11:30 a.m. Eastern, which is 6 p.m. to 9 p.m. IST during daylight time and 7 p.m. to 10 p.m. IST in winter. That keeps New York inside normal working hours and India in the evening rather than the small hours. Push past noon Eastern and the Indian side is already past 9:30 p.m.; start before 8 a.m. Eastern and New York absorbs the pain instead.