I to IST Converter
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Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
9:00 pm21:00 I (UTC+9), Oct 13, 2026 = 5:30 pm17:30 IST (UTC+5:30), Oct 13, 2026
I is 3 hours and 30 minutes ahead of IST.
I and IST examples
These examples always use I (UTC+9) and IST (UTC+5:30). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
I is 3 hours and 30 minutes ahead of IST.
How the time difference changes
I is 3 hours and 30 minutes ahead of IST year-round.
Working hours of 9:00 am to 5:00 pm in I correspond to 5:30 am to 1:30 pm in IST.Working hours of 09:00 to 17:00 in I correspond to 05:30 to 13:30 in IST.
Compare I time with IST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
India Time Zone is 3 hours and 30 minutes ahead of India Standard Time.
9:00 pm21:00 in I is 5:30 pm17:30 in IST
I to IST call time
Best time for a conference call or a meeting is between 12:30pm-5pm12:30-17:00 in I which corresponds to 9am-1:30pm09:00-13:30 in IST
9:00 pm21:00 India Time Zone (I). Offset UTC +9:00 hours
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
9:00 pm21:00 I / 5:30 pm17:30 IST
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| I | IST |
|---|---|
| 8:30pm previous day | |
| 9:30pm previous day | |
| 10:30pm previous day | |
| 11:30pm previous day | |
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| 5:30am | |
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| 12:30pm | |
| 1:30pm | |
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| 5:30pm | |
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| 20:30 previous day | |
| 21:30 previous day | |
| 22:30 previous day | |
| 23:30 previous day | |
| 00:30 | |
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| 17:30 | |
| 18:30 | |
| 19:30 |
India Time Zone
Offset: I is 9 hours ahead of Greenwich Mean Time (GMT).
Daylight Saving: Clocks in India Time Zone (I) do not change for daylight saving time, so I stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
I representations, usage and related time zones
- +09 - basic short
- +0900 - basic
- +09:00 - extended
- +0900 - sign character (+) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates an offset of nine hours to the east of the zero meridian.
- India - Military abbreviation for I
- I - short form of 'India'
- AWDT - Australian Western Daylight Time
- CHOST - Choibalsan Summer Time
- I - India Time Zone
- IRKST - Irkutsk Summer Time
- JST - Japan Standard Time
- KST - Korea Standard Time
- PWT - Palau Time
- TLT - East Timor Time
- ULAST - Ulaanbaatar Summer Time
- WIT - Eastern Indonesian Time
- YAKT - Yakutsk Time
India Standard Time
Offset: IST is 5 hours and 30 minutes ahead of Greenwich Mean Time (GMT).
Countries using this time zone: India
Principal Cities: The largest city in the IST time zone is Mumbai in India, with about 12.692 million people. Other major cities in this time zone include Delhi, Bengaluru, Hyderabad, Ahmedabad.
Daylight Saving: Clocks in India Standard Time (IST) do not change for daylight saving time, so IST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
IST representations, usage and related time zones
- +0530 - basic
- +05:30 - extended
- +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates an offset of five hours and thirty minutes to the east of the zero meridian.
- Asia/Calcutta
- Asia/Kolkata
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2