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IST to EST Time Converter

IST means India Standard Time (UTC+5:30); EST means Eastern Standard Time (UTC−5). These named offsets do not change with the season. The city planner below follows local clock changes instead.

Resolves to India Standard Time (UTC+5:30, Asia/Kolkata). IST also refers to Irish Standard Time (UTC+1 during the Irish summer) and Israel Standard Time (Asia/Jerusalem, UTC+2). Confirm the city when someone writes IST.

  • 9:00 AM IST = 10:30 PM EST (previous day)
  • 12:00 PM IST = 1:30 AM EST
  • 5:00 PM IST = 6:30 AM EST

Local-time planner: Kolkata and New York. Cities follow their own DST rules. The reference sections below use September 12, 2026 in Kolkata; changing the planner does not update those sections.

Need the opposite direction? New York to Kolkata Time →

Current City Times

Kolkata

+05:30

Sat, Sep 12 · IST

New York

-04:00

Sat, Sep 12 · EDT

City Daylight Saving Time Status

Kolkata

Kolkata does not observe Daylight Saving Time.

New York

New York is currently observing EDT (summer time). Returns to standard time on November 1, 2026.

Abbreviation note: IST on this page refers to India Standard Time (UTC+5:30). IST is also used for Irish Standard Time (UTC+1, summer only) and Israel Standard Time (UTC+2). When coordinating across teams, confirm which IST your contacts are using. Why EST and EDT are different →

City Meeting Times

No fully-overlapping 9 AM–6 PM window exists between Kolkata and New York. The yellow (⚠️) rows below are edge-hour windows — one side is at the boundary of their working day. These work for brief syncs; async tools are better for most ongoing collaboration.
Kolkata TimeNew York TimeMeeting Suitability
00:0014:30-1d
01:0015:30-1d
02:0016:30-1d
03:0017:30-1d
04:0018:30-1d
05:0019:30-1d
06:0020:30-1d
07:0021:30-1d
08:0022:30-1d
09:0023:30-1d
10:0000:30
11:0001:30
12:0002:30
13:0003:30
14:0004:30
15:0005:30
16:0006:30
17:0007:30
18:0008:30⚠️ Edge
19:0009:30
20:0010:30
21:0011:30
22:0012:30
23:0013:30

✅ Both cities within 9 AM–6 PM  ⚠️ One city on edge of working hours

About This Time Zone Pair

Kolkata and New York span a large enough offset that no standard 9 AM–6 PM business overlap exists. Many global teams working this pair adopt async-first workflows and reserve live calls, chats, and syncs for high-priority moments. The most sustainable recurring slot tends to be early morning US / end-of-business India, or late evening US / early morning India.

Kolkata (IST) is currently 9 hours 30 minutes ahead of New York (EDT). For September 12, 2026: 9:00 AM IST = 11:30 PM EDT (previous day).

New York observes Daylight Saving Time while Kolkata does not. Their time difference changes when the city observing DST changes its clocks.

There is no standard 9 AM–6 PM overlap between Kolkata and New York. For recurring calls or meetings, consider early morning in Kolkata or late afternoon in New York, and use async tools when possible.

Export a one-off .ics calendar invite for the selected event. To make it recurring at a fixed local hour, configure the series and its anchor city timezone in your calendar application.

The city reference sections cover Kolkata and New York local times specifically. To convert a different pair, browse all conversions or add cities directly in the converter above.

Frequently Asked Questions

What is the time difference between Kolkata and New York?
New York is currently 9 hours 30 minutes behind Kolkata. New York observes Daylight Saving Time while Kolkata does not. Their time difference changes when the city observing DST changes its clocks.
What is a good meeting time between Kolkata and New York?
There is no 9 AM–6 PM overlap for today's reference table between Kolkata and New York. Agree an outside-hours time or use async communication.
Does Kolkata observe Daylight Saving Time?
Kolkata does not observe Daylight Saving Time under current rules. Its own UTC offset has no seasonal DST change; its difference from a city that observes DST can still change.
How do I convert IST to EST manually?
Subtract 10 hours 30 minutes from the IST time. For example, 9:00 AM IST = 10:30 PM EST (previous day). This conversion uses the named fixed offsets, not the cities' seasonal local times.
What are common IST to EST conversions?
9:00 AM IST = 10:30 PM EST (previous day) · 12:00 PM IST = 1:30 AM EST · 5:00 PM IST = 6:30 AM EST. For date-aware city times, use the local-time planner below the fixed-offset answer.

Related Guides

City reference fact card

Route:
KolkataNew York
Current offset:
New York is 9 hours 30 minutes behind Kolkata
Timezone data:
IANA tz database (tzdata)
DST handling:
City offsets reflect the reference instant shown below. Use the planner for your meeting date.
Last calculated:
2026-09-12 13:21 UTC. Cached reference; it does not follow planner changes.

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