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Specific time, zone to zone

8:00 am IST to EST — 9:30 pm (previous day) EST

8:00 am India Standard Time (IST) is 9:30 pm (previous day) Eastern Time (EST) while both regions are on standard time. During the daylight saving period the answer becomes 10:30 pm (previous day), because one of the two zones shifts its clocks and the other does not.

Standard time

9:30 pm (previous day)

Applies while neither zone is on daylight saving — broadly November to March in the northern hemisphere.

Daylight saving

10:30 pm (previous day)

Applies while the clocks are forward. This pair does not keep a constant gap, so check the date.

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How the two zones line up

India Standard Time runs at UTC+5:30 in winter and UTC+5:30 in summer. Eastern Time runs at UTC−5 and UTC−4 respectively. Take the difference between the two, add it to 8:00 am, and you get the local time on the other side.

Daylight saving

This pair is one of the awkward ones: the gap between the two zones is not constant, so a meeting booked in one season drifts by an hour in the other. Diary invitations sent as a fixed clock time rather than as a calendar event are the usual casualty.

Where this conversion gets used

  • Calls with American clients
  • US market hours
  • delivery-team handovers
  • visa and embassy appointments

IST to EST — every hour

Both columns are computed from the IANA database, so they follow the real transition dates.

ISTEST — standardEST — daylight saving
12:00 am1:30 pm (previous day)2:30 pm (previous day)
1:00 am2:30 pm (previous day)3:30 pm (previous day)
2:00 am3:30 pm (previous day)4:30 pm (previous day)
3:00 am4:30 pm (previous day)5:30 pm (previous day)
4:00 am5:30 pm (previous day)6:30 pm (previous day)
5:00 am6:30 pm (previous day)7:30 pm (previous day)
6:00 am7:30 pm (previous day)8:30 pm (previous day)
7:00 am8:30 pm (previous day)9:30 pm (previous day)
8:00 am9:30 pm (previous day)10:30 pm (previous day)
9:00 am10:30 pm (previous day)11:30 pm (previous day)
10:00 am11:30 pm (previous day)12:30 am
11:00 am12:30 am1:30 am
12:00 pm1:30 am2:30 am
1:00 pm2:30 am3:30 am
2:00 pm3:30 am4:30 am
3:00 pm4:30 am5:30 am
4:00 pm5:30 am6:30 am
5:00 pm6:30 am7:30 am
6:00 pm7:30 am8:30 am
7:00 pm8:30 am9:30 am
8:00 pm9:30 am10:30 am
9:00 pm10:30 am11:30 am
10:00 pm11:30 am12:30 pm
11:00 pm12:30 pm1:30 pm

Questions people ask

9:30 pm (previous day) EST during standard time, and 10:30 pm (previous day) while daylight saving is in effect. Check which period the date falls in before you commit to a slot.

Related conversions

10:00 am IST to EST6:00 am IST to EST7:00 am IST to EST9:00 am IST to EST

All conversions →

Booking something recurring?

A fixed clock time drifts when either side changes its clocks. Our guides explain how to stop that happening.

Read the DST guidePlan a meeting