TimeToZone

IST to Ottawa Time Converter

EST is 10 hours 30 minutes behind IST. 9:00 AM IST = 10:30 PM EST (previous day).

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ISTfrom
India Standard Time
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Ottawa
Ottawa, Canada
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EST is 10 hours 30 minutes behind IST at the moment. To convert IST to Ottawa Time, subtract 10 hours 30 minutes from the IST time: 9:00 AM IST = 10:30 PM EST (previous day).

IST (India Time) is used in India and Sri Lanka (UTC+5:30, no daylight saving time). Ottawa Time (Ottawa time) is used in Ottawa, Canada.

IST here means India Standard Time, not Irish or Israel Standard Time.

IST to Ottawa Time time conversion table

IST to Ottawa Time on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.

ISTOttawa TimeDay
12:00 AM IST1:30 PM ESTprevious day
1:00 AM IST2:30 PM ESTprevious day
2:00 AM IST3:30 PM ESTprevious day
3:00 AM IST4:30 PM ESTprevious day
4:00 AM IST5:30 PM ESTprevious day
5:00 AM IST6:30 PM ESTprevious day
6:00 AM IST7:30 PM ESTprevious day
7:00 AM IST8:30 PM ESTprevious day
8:00 AM IST9:30 PM ESTprevious day
9:00 AM IST10:30 PM ESTprevious day
10:00 AM IST11:30 PM ESTprevious day
11:00 AM IST12:30 AM ESTnight
12:00 PM IST1:30 AM ESTnight
1:00 PM IST2:30 AM ESTnight
2:00 PM IST3:30 AM ESTnight
3:00 PM IST4:30 AM ESTnight
4:00 PM IST5:30 AM ESTnight
5:00 PM IST6:30 AM EST—
6:00 PM IST7:30 AM EST—
7:00 PM IST8:30 AM EST—
8:00 PM IST9:30 AM EST—
9:00 PM IST10:30 AM EST—
10:00 PM IST11:30 AM EST—
11:00 PM IST12:30 PM EST—
  • Work rows — 9 AM–5 PM in both places
  • Night in the destination (10 PM–6 AM)

How to convert IST to Ottawa Time

Subtract 10 hours 30 minutes from the IST time to get Ottawa Time.

Example: 9:00 AM IST = 10:30 PM EST (previous day).

Across midnight: 1:00 AM IST = 2:30 PM EST (previous day). The date changes, so always check the day as well as the hour.

Time difference between IST and Ottawa Time

The time difference between IST and Ottawa Time is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:

  • 1 Jan 2026 – 7 Mar 2026: Ottawa Time is 10 hours 30 minutes behind of IST.
  • 8 Mar 2026 – 31 Oct 2026: Ottawa Time is 9 hours 30 minutes behind of IST.
  • 1 Nov 2026 – 31 Dec 2026: Ottawa Time is 10 hours 30 minutes behind of IST.

IST and Ottawa Time during daylight saving time

  • IST does not observe daylight saving time; it stays on UTC+5:30 all year.
  • Ottawa Time next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from EST (UTC−5) to EDT (UTC−4).

Best time for a meeting between IST and Ottawa Time

IST and Ottawa Time have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM IST, which is 8:30 PM EST.

Plan a meeting across more time zones.

IST to Ottawa Time FAQ

What is the time difference between IST and Ottawa Time?

Right now EST is 10 hours 30 minutes behind IST. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.

What is 9 AM IST in Ottawa Time?

9:00 AM IST is 10:30 PM EST (previous day).

What is 12 PM (noon) IST in Ottawa Time?

12:00 PM IST is 1:30 AM EST.

Is Ottawa Time ahead of or behind IST?

EST is 10 hours 30 minutes behind IST, so it is earlier in Ottawa Time than in IST.

Does IST change for daylight saving time?

No. IST stays on the same offset all year, so conversions never shift for daylight saving time.

Does Ottawa Time change for daylight saving time?

Yes. Ottawa Time next changes on 14 Mar 2027, when clocks go forward one hour from EST to EDT.

What is the best time for a meeting between IST and Ottawa Time?

IST and Ottawa Time have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM IST, which is 8:30 PM EST.

Related conversions

Convert Ottawa Time to IST

Convert IST to other time zones

Convert other time zones to Ottawa Time

Learn more

Updated 7 November 2026. Time zone data: IANA tz database.