GST to IST Converter
Convert Gulf Standard Time (GST) — UAE to India Standard Time (IST). Pick any date — daylight saving is applied from the IANA time zone database, so the answer is right in March and in November.
GST to IST
GST is 1 hour and 30 minutes behind IST.
Quick answer. IST is 1 hour and 30 minutes ahead of GST, and that gap never changes. Neither GST nor IST observes daylight saving time, so the same conversion is correct on every date of the year.
Time difference
Gulf Standard Time (GST) — UAE
GST UTC+4:00 No DST
Dubai, Abu Dhabi, Sharjah, Muscat.
The UAE is a fixed UTC+4:00 with no daylight saving, so India is permanently 1 hour 30 minutes ahead of Dubai. The UAE working week runs Monday to Friday, with a half-day Friday in the public sector.
India Standard Time (IST)
IST UTC+5:30 No DST
Mumbai, Delhi, Bengaluru, Chennai, Kolkata, Hyderabad.
India runs on a single time zone, UTC+5:30, and has not observed daylight saving time since 1945. The half-hour offset is why IST conversions rarely land on a round hour.
GST to IST conversion table
Every hour of the day for 2026. Neither side observes daylight saving, so this table is correct on every date of the year.
| GST | IST | 24-hour |
|---|---|---|
| 12 AM | 1:30 AM | 01:30 |
| 1 AM | 2:30 AM | 02:30 |
| 2 AM | 3:30 AM | 03:30 |
| 3 AM | 4:30 AM | 04:30 |
| 4 AM | 5:30 AM | 05:30 |
| 5 AM | 6:30 AM | 06:30 |
| 6 AM | 7:30 AM | 07:30 |
| 7 AM | 8:30 AM | 08:30 |
| 8 AM | 9:30 AM | 09:30 |
| 9 AM | 10:30 AM | 10:30 |
| 10 AM | 11:30 AM | 11:30 |
| 11 AM | 12:30 PM | 12:30 |
| 12 PM | 1:30 PM | 13:30 |
| 1 PM | 2:30 PM | 14:30 |
| 2 PM | 3:30 PM | 15:30 |
| 3 PM | 4:30 PM | 16:30 |
| 4 PM | 5:30 PM | 17:30 |
| 5 PM | 6:30 PM | 18:30 |
| 6 PM | 7:30 PM | 19:30 |
| 7 PM | 8:30 PM | 20:30 |
| 8 PM | 9:30 PM | 21:30 |
| 9 PM | 10:30 PM | 22:30 |
| 10 PM | 11:30 PM | 23:30 |
| 11 PM | 12:30 AM +1 day | 00:30 |
Highlighted rows are the 7 hours where a 9–6 working day in GST overlaps a 9–5 working day in IST.
Popular conversion times
| GST | IST |
|---|---|
| 9 AM GST | 10:30 AM |
| 10 AM GST | 11:30 AM |
| 11 AM GST | 12:30 PM |
| 12 PM GST | 1:30 PM |
| 3 PM GST | 4:30 PM |
| 5 PM GST | 6:30 PM |
| 6 PM GST | 7:30 PM |
| 8 PM GST | 9:30 PM |
Business hours and meeting times
Comparing a 9:00–18:00 working day in GST against 9:00–17:00 in IST, across the whole week — a slot only counts if it lands on a working day at both ends.
Both sides work Monday to Friday, so the working weeks line up and you share 5 days. GST keeps a short Friday, so the usable window narrows at the end of the week.
Rows are days in GST. Columns are hours of the GST day.
Best recurring slot
11 AM GST = 12:30 PM IST , every shared working day
Across the week that is 27 overlapping working hours . The widest day is Monday, with 6 hours.
| Day | Overlap (GST) | Local (IST) | Hours |
|---|---|---|---|
| Monday | 9 AM – 3 PM | 10:30 AM – 4:30 PM | 6 |
| Tuesday | 9 AM – 3 PM | 10:30 AM – 4:30 PM | 6 |
| Wednesday | 9 AM – 3 PM | 10:30 AM – 4:30 PM | 6 |
| Thursday | 9 AM – 3 PM | 10:30 AM – 4:30 PM | 6 |
| Friday | 9 AM – 12 PM | 10:30 AM – 1:30 PM | 3 |
| Saturday | GST weekend | — | — |
| Sunday | GST weekend | — | — |
Public holidays
A shared working day is only usable if neither side is on holiday — and India and IST build their calendars on different systems, so the days each loses rarely coincide.
Over the next 8 weeks you share 40 working days. 2are lost to a public holiday on one side or the other, leaving 38.
| Date | Who is off | Holiday |
|---|---|---|
| Friday, October 2, 2026 | India | Gandhi Jayanti |
| Tuesday, October 20, 2026 | India | Dussehra (Vijayadashami) |
Next holidays in GST
- Tuesday, December 1, 2026Commemoration Daysame date every year
- Wednesday, December 2, 2026UAE National Daysame date every year
- Thursday, December 3, 2026UAE National Daysame date every year
- Friday, January 1, 2027New Year's Daysame date every year
- Tuesday, March 9, 2027Eid al-Fitrpredicted — lunar calendar
UAE national holidays. Eid dates are predicted from the Islamic calendar and confirmed by official announcement, usually a few days ahead.
Next holidays in India
- Friday, October 2, 2026Gandhi Jayantisame date every year
- Tuesday, October 20, 2026Dussehra (Vijayadashami)partialpublished date
- Sunday, November 8, 2026Diwalipublished date
- Monday, November 9, 2026Diwalipublished date
- Friday, December 25, 2026Christmas Daypartialsame date every year
India has three national holidays on which the whole country closes. Everything else is either a central-government gazetted holiday that individual employers choose to observe, or a state holiday. Festival dates follow lunisolar calendars and move every year, so they are listed explicitly rather than derived.
Holiday dates for GST and elsewhere come from a dataset last refreshed on 2026-09-12 (date.nager.at plus curated national calendars). Lunar dates — Eid, Chinese New Year, the Jewish holidays — are predicted and can move by a day once officially announced. Regional, state and employer-specific holidays are not included. Confirm anything you are booking a flight around.
About this conversion
The UAE is a fixed UTC+4:00 with no daylight saving, so India is permanently 1 hour 30 minutes ahead of Dubai. The UAE working week runs Monday to Friday, with a half-day Friday in the public sector.
India runs on a single time zone, UTC+5:30, and has not observed daylight saving time since 1945. The half-hour offset is why IST conversions rarely land on a round hour.
Frequently asked questions
What is the time difference between GST and IST?
IST is 1 hour and 30 minutes ahead of GST, on every date of the year. Neither side observes daylight saving time.
What time is 9 AM GST in IST?
9:00 AM GST is 10:30 AM in IST, all year round.
What is the best time for a meeting between GST and IST?
Working days overlap for about 6 hours on a typical Monday: 9 AM to 3 PM GST, which is 10:30 AM to 4:30 PM in IST. For a recurring invite, 11 AM GST / 12:30 PM IST is the slot that works on the most days.
Does GST observe daylight saving time?
No. GST stays on GST (UTC+4:00) for the whole year, with no daylight saving changeover.
How many hours a week do GST and IST actually overlap?
27 hours across the week, spread over 5 working days. 11 AM GST (12:30 PM IST) is the slot that works on the most days, so it is the one to put in a recurring invite.
Do public holidays in GST and IST line up?
Barely. Over the next eight weeks the two sides share 40 working days, and 2 of those are a public holiday on one side or the other, leaving 38. The next holiday in IST is Gandhi Jayanti on 2026-10-02. Indian, Gulf and Western holiday calendars are built on different systems, so the days each side loses rarely coincide.
Is GST ahead of IST?
No, it is the other way around: IST is ahead of GST by 1 hour and 30 minutes.
Converting the other way
Looking up times starting from IST? Use the IST to GST converter, which leads with IST as the starting point and is written for that reader.
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