TimeToZone

IST to Southampton Time Converter

GMT is 5 hours 30 minutes behind IST. 9:00 AM IST = 3:30 AM GMT.

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ISTfrom
India Standard Time
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Southampton
Southampton, UK
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GMT is 5 hours 30 minutes behind IST at the moment. To convert IST to Southampton Time, subtract 5 hours 30 minutes from the IST time: 9:00 AM IST = 3:30 AM GMT.

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

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

IST to Southampton Time time conversion table

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

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

How to convert IST to Southampton Time

Subtract 5 hours 30 minutes from the IST time to get Southampton Time.

Example: 9:00 AM IST = 3:30 AM GMT.

Across midnight: 1:00 AM IST = 7:30 PM GMT (previous day). The date changes, so always check the day as well as the hour.

Time difference between IST and Southampton Time

The time difference between IST and Southampton 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 – 28 Mar 2026: Southampton Time is 5 hours 30 minutes behind of IST.
  • 29 Mar 2026 – 24 Oct 2026: Southampton Time is 4 hours 30 minutes behind of IST.
  • 25 Oct 2026 – 31 Dec 2026: Southampton Time is 5 hours 30 minutes behind of IST.

IST and Southampton Time during daylight saving time

  • IST does not observe daylight saving time; it stays on UTC+5:30 all year.
  • Southampton Time next changes on 28 Mar 2027: clocks go forward one hour at 00:59 local time, from GMT (UTC+0) to BST (UTC+1).

Best time for a meeting between IST and Southampton Time

IST and Southampton Time share 2 hours 30 minutes of the 9 AM–5 PM working day. Any time between 2:30 PM and 5:00 PM IST lands between 9:00 AM and 11:30 AM GMT, inside working hours for both.

Plan a meeting across more time zones.

IST to Southampton Time FAQ

What is the time difference between IST and Southampton Time?

Right now GMT is 5 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 Southampton Time?

9:00 AM IST is 3:30 AM GMT.

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

12:00 PM IST is 6:30 AM GMT.

Is Southampton Time ahead of or behind IST?

GMT is 5 hours 30 minutes behind IST, so it is earlier in Southampton 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 Southampton Time change for daylight saving time?

Yes. Southampton Time next changes on 28 Mar 2027, when clocks go forward one hour from GMT to BST.

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

IST and Southampton Time share 2 hours 30 minutes of the 9 AM–5 PM working day. Any time between 2:30 PM and 5:00 PM IST lands between 9:00 AM and 11:30 AM GMT, inside working hours for both.

Related conversions

Convert Southampton Time to IST

Convert IST to other time zones

Convert other time zones to Southampton Time

Learn more

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