IST to GST Converter & Meeting Planner
Quick answer: 9:00 AM IST = 7:30 AM GST (fixed +05:30 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Indian Standard Time (IST) and Gulf Standard Time (GST)? You need to account for the standard time difference. Gulf Standard Time is normally 1.5 hours behind Indian Standard Time. Whether you are coordinating between teams in Mumbai and New Delhi and Dubai and Abu Dhabi, 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 IST = 10:30 PM GST. The full 24-hour IST to GST table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM IST = 1:30 PM GST.
| IST Time | GST Time |
|---|---|
| 12:00 AM (00:00) | 10:30 PM (22:30)-1 day |
| 1:00 AM (01:00) | 11:30 PM (23:30)-1 day |
| 2:00 AM (02:00) | 12:30 AM (00:30) |
| 3:00 AM (03:00) | 1:30 AM (01:30) |
| 4:00 AM (04:00) | 2:30 AM (02:30) |
| 5:00 AM (05:00) | 3:30 AM (03:30) |
| 6:00 AM (06:00) | 4:30 AM (04:30) |
| 7:00 AM (07:00) | 5:30 AM (05:30) |
| 8:00 AM (08:00) | 6:30 AM (06:30) |
| 9:00 AM (09:00) | 7:30 AM (07:30) |
| 10:00 AM (10:00) | 8:30 AM (08:30) |
| 11:00 AM (11:00) | 9:30 AM (09:30) |
| 12:00 PM (12:00) | 10:30 AM (10:30) |
| 1:00 PM (13:00) | 11:30 AM (11:30) |
| 2:00 PM (14:00) | 12:30 PM (12:30) |
| 3:00 PM (15:00) | 1:30 PM (13:30) |
| 4:00 PM (16:00) | 2:30 PM (14:30) |
| 5:00 PM (17:00) | 3:30 PM (15:30) |
| 6:00 PM (18:00) | 4:30 PM (16:30) |
| 7:00 PM (19:00) | 5:30 PM (17:30) |
| 8:00 PM (20:00) | 6:30 PM (18:30) |
| 9:00 PM (21:00) | 7:30 PM (19:30) |
| 10:00 PM (22:00) | 8:30 PM (20:30) |
| 11:00 PM (23:00) | 9:30 PM (21:30) |
Best time to call Dubai from Mumbai
For most work calls, compare the normal business day in Mumbai (IST) with the business day in Dubai (GST). IST commonly covers South Asia, while GST is mainly associated with Middle East, Gulf Region.
⚠️ 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 10:30 AM - 6:30 PM IST, which corresponds to 9:00 AM - 5:00 PM GST. This window sits inside the typical IST workday (9:30 AM - 6:30 PM) and the GST workday (9:00 AM - 6:00 PM).
- DST Safety: Neither IST nor GST uses Daylight Saving Time in our dataset, making business-hour relationships stable year-round.
- Bombay Stock Exchange (BSE): 09:15-15:30 local time in Mumbai.
- Dubai Financial Market (DFM): 10:00-15:00 local time in Dubai.
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Frequently Asked Questions
What is the time difference between IST and GST?
During standard time, Gulf Standard Time is 1.5 hours behind Indian Standard Time.
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.
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.