IST to EST converter
India is 10½ hours ahead of New York from November to March, and 9½ hours ahead from March to November.
New York is 10 hours 30 minutes behind India in winter and 9 hours 30 minutes behind in summer.
Who this time difference really matters to
The gap between India and the US East Coast is one of the most-used time conversions in the world, because so much work and so many families span it. The same 9½ or 10½ hours looks very different depending on which side of it you live on.
Working a US shift from India
Support, IT and back-office teams in India often work New York’s day, which lands in India’s night.
- 9 AM–5 PM New York, Nov–Mar: 7:30 PM–3:30 AM IST
- 9 AM–5 PM New York, Mar–Nov: 6:30 PM–2:30 AM IST
The US office never moves. In March your shift starts an hour earlier by the Indian clock, and in November an hour later. Check cab pick-ups and rosters in those two weeks.
Calling family in the US
There are two easy windows every day, one at each end of India’s day.
- India 7–9 AM = New York’s previous evening (8:30–10:30 PM in winter, 9:30–11:30 PM in summer)
- India 8–10 PM = New York’s morning (9:30–11:30 AM in winter, 10:30 AM–12:30 PM in summer)
Sunday morning in New York is Sunday evening in India, which is why so many weekly family calls happen then.
Teams in Bengaluru, Pune or Mumbai working with New York
A 9-to-6 day in India and a 9-to-5 day in New York don’t overlap at all. Someone always stretches.
- India 6:30–9:30 PM = New York 8–11 AM (winter) or 9 AM–12 PM (summer)
- India’s Monday 10 AM is still Sunday night in New York
- A 2 PM Friday request from New York arrives at 12:30 AM Saturday in India
Following both stock markets
NSE and BSE trade 9:15 AM–3:30 PM IST. The New York Stock Exchange and Nasdaq open at 9:30 AM Eastern.
- US session, Nov–Mar: 8:00 PM–2:30 AM IST
- US session, Mar–Nov: 7:00 PM–1:30 AM IST
The two markets never overlap. Indian markets close 4½ hours before New York opens in winter, and 3½ hours before in summer.
Why the gap changes twice a year
India runs on a single time zone, India Standard Time, set at UTC+5:30. It is measured from the 82.5° East meridian near Mirzapur, which is where the unusual half-hour comes from. India has no daylight saving time, so its clocks never move.
New York does move. It uses Eastern Standard Time (UTC−5) from the first Sunday of November and Eastern Daylight Time (UTC−4) from the second Sunday of March. That one-hour switch is the whole reason the gap flips between 10½ and 9½ hours.
“EST” in an invite usually means New York time, not UTC−5
Many people write “EST” all year. If a colleague sends “10 AM EST” in July, they almost always mean 10 AM in New York, which is EDT and 7:30 PM IST, not 8:30 PM. When in doubt, ask for “ET” (Eastern Time) or the city name. Calendar apps that store the event in “America/New_York” handle the switch for you. Times typed into the subject line do not.
The date catches people out more than the hour
Until 10:30 AM IST in winter, or 9:30 AM IST in summer, New York is still on the previous calendar day. A deadline of “end of day Tuesday” in New York is Wednesday morning in India, which is usually the more useful reading for anyone in India trying to hit it.
IST to New York time, every hour
Both columns are New York. Use the first between early November and mid-March, and the second for the rest of the year. Green rows are the easiest meeting hours: New York is in its working morning and it is still a reasonable evening in India.
| India (IST) | New York, Nov–MarEST, UTC−5 | New York, Mar–NovEDT, UTC−4 |
|---|---|---|
| 12:00 AM (midnight) | 1:30 PM prev. day | 2:30 PM prev. day |
| 1:00 AM | 2:30 PM prev. day | 3:30 PM prev. day |
| 2:00 AM | 3:30 PM prev. day | 4:30 PM prev. day |
| 3:00 AM | 4:30 PM prev. day | 5:30 PM prev. day |
| 4:00 AM | 5:30 PM prev. day | 6:30 PM prev. day |
| 5:00 AM | 6:30 PM prev. day | 7:30 PM prev. day |
| 6:00 AM | 7:30 PM prev. day | 8:30 PM prev. day |
| 7:00 AM | 8:30 PM prev. day | 9:30 PM prev. day |
| 8:00 AM | 9:30 PM prev. day | 10:30 PM prev. day |
| 9:00 AM | 10:30 PM prev. day | 11:30 PM prev. day |
| 10:00 AM | 11:30 PM prev. day | 12:30 AM |
| 11:00 AM | 12:30 AM | 1:30 AM |
| 12:00 PM (noon) | 1:30 AM | 2:30 AM |
| 1:00 PM | 2:30 AM | 3:30 AM |
| 2:00 PM | 3:30 AM | 4:30 AM |
| 3:00 PM | 4:30 AM | 5:30 AM |
| 4:00 PM | 5:30 AM | 6:30 AM |
| 5:00 PM | 6:30 AM | 7:30 AM |
| 6:00 PM | 7:30 AM | 8:30 AM |
| 7:00 PM | 8:30 AM | 9:30 AM |
| 8:00 PM | 9:30 AM | 10:30 AM |
| 9:00 PM | 10:30 AM | 11:30 AM |
| 10:00 PM | 11:30 AM | 12:30 PM |
| 11:00 PM | 12:30 PM | 1:30 PM |
“prev. day” means New York is still on the day before India.
Quick answers
How many hours is India ahead of New York?
10 hours 30 minutes from early November to mid-March, when New York is on EST (UTC−5). 9 hours 30 minutes from mid-March to early November, when New York is on EDT (UTC−4). India stays on UTC+5:30 all year, so only the US side moves.
What is 9 AM EST in IST?
9:00 AM EST is 7:30 PM IST the same day. In summer, 9:00 AM EDT is 6:30 PM IST.
What is 10 PM IST in New York time?
10:00 PM IST is 11:30 AM EST in winter and 12:30 PM EDT in summer, on the same calendar day.
What are US shift timings in IST?
A 9 AM to 5 PM New York shift runs from 7:30 PM to 3:30 AM IST between November and March, and from 6:30 PM to 2:30 AM IST between March and November.
Does India have daylight saving time?
No. India uses India Standard Time, UTC+5:30, all year and never changes its clocks. Every change in the India to New York gap comes from the US switching between EST and EDT.
When does the India to New York time difference change next?
On Sunday 1 November 2026 US clocks go back and the gap widens to 10 hours 30 minutes. On Sunday 14 March 2027 they go forward and it narrows to 9 hours 30 minutes.