GMT vs GST
Greenwich Mean Time / UK (GMT/BST) is UTC+0 in winter and UTC+1 in summer. Gulf Standard Time (UAE) (GST) is UTC+4 year-round.
Because Greenwich Mean Time / UK observes daylight saving and the other zone does not, the gap changes during the year: 4 hours ahead in the northern winter and 3 hours ahead in summer, with a few weeks in spring and autumn where it's an hour different again. The converter uses the exact rules for the date you choose.
GMT to GST conversion table
Summer (daylight saving) times, mid-July:
| GMT/BST | GST |
|---|---|
| 12:00 AM | 3:00 AM |
| 6:00 AM | 9:00 AM |
| 8:00 AM | 11:00 AM |
| 9:00 AM | 12:00 PM |
| 10:00 AM | 1:00 PM |
| 12:00 PM | 3:00 PM |
| 2:00 PM | 5:00 PM |
| 3:00 PM | 6:00 PM |
| 5:00 PM | 8:00 PM |
| 6:00 PM | 9:00 PM |
| 8:00 PM | 11:00 PM |
| 10:00 PM | 1:00 AM (+1 day) |
Winter (standard) times, mid-January:
| GMT | GST |
|---|---|
| 12:00 AM | 4:00 AM |
| 6:00 AM | 10:00 AM |
| 8:00 AM | 12:00 PM |
| 9:00 AM | 1:00 PM |
| 10:00 AM | 2:00 PM |
| 12:00 PM | 4:00 PM |
| 2:00 PM | 6:00 PM |
| 3:00 PM | 7:00 PM |
| 5:00 PM | 9:00 PM |
| 6:00 PM | 10:00 PM |
| 8:00 PM | 12:00 AM (+1 day) |
| 10:00 PM | 2:00 AM (+1 day) |
Scheduling between GMT and GST
With only 3 hours between them, normal working hours overlap most of the day — a call at 10 AM in Greenwich Mean Time / UK is 1:00 PM in Gulf Standard Time (UAE). Always write the city alongside the abbreviation in invites — several abbreviations (CST, IST, AST) are used by more than one region.
Related conversions
GMT to EST · EST to GMT · GMT to PST · PST to GMT · GMT to CST · CST to GMT · GMT to IST · IST to GMT · GMT to AEST · AEST to GMT · all zones