GST to IST Converter & Meeting Planner
Quick answer: 9:00 AM GST = 10:30 AM IST (fixed +04:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Gulf Standard Time (GST) and Indian Standard Time (IST)? You need to account for the standard time difference. Indian Standard Time is normally 1.5 hours ahead of Gulf Standard Time. Whether you are coordinating between teams in Dubai and Abu Dhabi and Mumbai and New Delhi, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM GST = 1:30 AM IST. The full 24-hour GST to IST table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM GST = 4:30 PM IST.
| GST Time | IST Time |
|---|---|
| 12:00 AM (00:00) | 1:30 AM (01:30) |
| 1:00 AM (01:00) | 2:30 AM (02:30) |
| 2:00 AM (02:00) | 3:30 AM (03:30) |
| 3:00 AM (03:00) | 4:30 AM (04:30) |
| 4:00 AM (04:00) | 5:30 AM (05:30) |
| 5:00 AM (05:00) | 6:30 AM (06:30) |
| 6:00 AM (06:00) | 7:30 AM (07:30) |
| 7:00 AM (07:00) | 8:30 AM (08:30) |
| 8:00 AM (08:00) | 9:30 AM (09:30) |
| 9:00 AM (09:00) | 10:30 AM (10:30) |
| 10:00 AM (10:00) | 11:30 AM (11:30) |
| 11:00 AM (11:00) | 12:30 PM (12:30) |
| 12:00 PM (12:00) | 1:30 PM (13:30) |
| 1:00 PM (13:00) | 2:30 PM (14:30) |
| 2:00 PM (14:00) | 3:30 PM (15:30) |
| 3:00 PM (15:00) | 4:30 PM (16:30) |
| 4:00 PM (16:00) | 5:30 PM (17:30) |
| 5:00 PM (17:00) | 6:30 PM (18:30) |
| 6:00 PM (18:00) | 7:30 PM (19:30) |
| 7:00 PM (19:00) | 8:30 PM (20:30) |
| 8:00 PM (20:00) | 9:30 PM (21:30) |
| 9:00 PM (21:00) | 10:30 PM (22:30) |
| 10:00 PM (22:00) | 11:30 PM (23:30) |
| 11:00 PM (23:00) | 12:30 AM (00:30)+1 day |
Best time to call Mumbai from Dubai
For most work calls, compare the normal business day in Dubai (GST) with the business day in Mumbai (IST). GST commonly covers Middle East, Gulf Region, while IST is mainly associated with South Asia.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
✅ The most practical overlap on 2026-07-05 is usually 9:00 AM - 5:00 PM GST, which corresponds to 10:30 AM - 6:30 PM IST. This window sits inside the typical GST workday (9:00 AM - 6:00 PM) and the IST workday (9:30 AM - 6:30 PM).
- DST Safety: Neither GST nor IST uses Daylight Saving Time in our dataset, making business-hour relationships stable year-round.
- Dubai Financial Market (DFM): 10:00-15:00 local time in Dubai.
- Bombay Stock Exchange (BSE): 09:15-15:30 local time in Mumbai.
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Frequently Asked Questions
What is the time difference between GST and IST?
During standard time, Indian Standard Time is 1.5 hours ahead of Gulf Standard Time.
Does Dubai use Daylight Saving Time?
Dubai and the entire United Arab Emirates do not observe Daylight Saving Time, remaining fixed at UTC+4:00 throughout the year. This means the offset between Dubai and DST-observing countries such as the UK or the US shifts by one hour each spring and autumn when those countries change their clocks.
Is GST the same as UAE Standard Time?
Yes, UAE Standard Time is the national designation for the same UTC+4:00 offset that Gulf Standard Time describes regionally. Both terms refer to the same fixed clock used across the United Arab Emirates, and GST additionally covers Oman under its regional name.
Does India observe Daylight Saving Time (DST)?
India does not observe Daylight Saving Time and has not done so since 1945. IST remains fixed at UTC+5:30 every day of the year, meaning the offset between India and any DST-observing country shifts by one hour twice annually when those countries change their clocks.
Why does IST have a 30-minute offset?
India chose the 82.5° East meridian — which passes through Mirzapur in Uttar Pradesh — as its central reference longitude, as it bisects the subcontinent geographically. That meridian sits exactly 5 hours and 30 minutes ahead of the Prime Meridian in Greenwich, producing the UTC+5:30 offset that has defined IST since 1906.