Convert Greenwich Mean Time to Central Standard Time - Quick & Accurate
Updates live every second
Hover over any hour to see corresponding time in both zones
To schedule a meeting between GMT and CST:
Pro Tip: Schedule calls during the overlap window for optimal convenience for both time zones
| GMT Time | CST Time | Context |
|---|---|---|
| 12:00 AM | 06:00 PM | Midnight GMT |
| 01:00 AM | 07:00 PM | Late Night |
| 02:00 AM | 08:00 PM | Late Night |
| 03:00 AM | 09:00 PM | Late Night |
| 04:00 AM | 10:00 PM | Late Night |
| 05:00 AM | 11:00 PM | Late Night |
| 06:00 AM | 12:00 AM | Early Morning GMT |
| 07:00 AM | 01:00 AM | Night Time |
| 08:00 AM | 02:00 AM | Night Time |
| 09:00 AM | 03:00 AM | Work Starts GMT |
| 10:00 AM | 04:00 AM | Night Time |
| 11:00 AM | 05:00 AM | Night Time |
London
Europe/London
Chicago
America/Chicago
CST (Central Standard Time) is 6 hours behind GMT (Greenwich Mean Time). This means when it's 12:00 PM in London (GMT), it's 6:00 AM in Chicago (CST).
The best time to call from GMT to CST is during overlapping business hours. For GMT callers, schedule between 12:00 PM - 5:00 PM GMT to ensure both parties are within standard business hours.
The time difference may change during daylight saving transitions if one region observes DST while the other doesn't. Greenwich Mean Time (UTC+0 (GMT) / UTC+1 (BST)) and Central Standard Time (UTC-6 (CST) / UTC-5 (CDT)) may have different DST schedules.
GMT includes cities like London. CST includes cities like Chicago. Both time zones cover important business and cultural centers.
In 2025, DST in North America starts on March 9 at 2:00 AM and ends on November 2 at 2:00 AM. Other regions may have different DST schedules or not observe DST at all.