GMT to CST: GMT is 5 hours ahead of CST
Greenwich Mean Time is 5 hours ahead of Central Time right now. It is 3:21 am GMT in GMT and 10:21 pm CDT in Central, which is already the previous day there.
Convert a specific time from GMT to CST
Pick any time and date to convert it both ways. The conversion runs in your browser against the real zone rules, so a date inside a daylight saving period gets that period's offset rather than today's.
What is the time difference between GMT and CST?
Central Time is 5 hours behind Greenwich Mean Time. To go from GMT to CST you subtract 5 hours. That gap is not fixed. Across 2026 the distance between these two zones takes 2 different values, from 5 hours to 6 hours, because Central moves its clocks and GMT does not. This page recomputes it rather than assuming.
GMT to CST conversion table
Every hour of Friday, September 25, 2026 in GMT, with the matching reading in Central. 5 of the 24 hours land on a different calendar date in Central, which is the part people get wrong when they schedule across this pair.
| GMT | GMT 24h | CST | CST 24h | Date |
|---|---|---|---|---|
| 12:00 am | 00:00 | 7:00 pm | 19:00 | the previous day |
| 1:00 am | 01:00 | 8:00 pm | 20:00 | the previous day |
| 2:00 am | 02:00 | 9:00 pm | 21:00 | the previous day |
| 3:00 am | 03:00 | 10:00 pm | 22:00 | the previous day |
| 4:00 am | 04:00 | 11:00 pm | 23:00 | the previous day |
| 5:00 am | 05:00 | 12:00 am | 00:00 | same day |
| 6:00 am | 06:00 | 1:00 am | 01:00 | same day |
| 7:00 am | 07:00 | 2:00 am | 02:00 | same day |
| 8:00 am | 08:00 | 3:00 am | 03:00 | same day |
| 9:00 am | 09:00 | 4:00 am | 04:00 | same day |
| 10:00 am | 10:00 | 5:00 am | 05:00 | same day |
| 11:00 am | 11:00 | 6:00 am | 06:00 | same day |
| 12:00 pm | 12:00 | 7:00 am | 07:00 | same day |
| 1:00 pm | 13:00 | 8:00 am | 08:00 | same day |
| 2:00 pm | 14:00 | 9:00 am | 09:00 | same day |
| 3:00 pm | 15:00 | 10:00 am | 10:00 | same day |
| 4:00 pm | 16:00 | 11:00 am | 11:00 | same day |
| 5:00 pm | 17:00 | 12:00 pm | 12:00 | same day |
| 6:00 pm | 18:00 | 1:00 pm | 13:00 | same day |
| 7:00 pm | 19:00 | 2:00 pm | 14:00 | same day |
| 8:00 pm | 20:00 | 3:00 pm | 15:00 | same day |
| 9:00 pm | 21:00 | 4:00 pm | 16:00 | same day |
| 10:00 pm | 22:00 | 5:00 pm | 17:00 | same day |
| 11:00 pm | 23:00 | 6:00 pm | 18:00 | same day |
What are the best hours to schedule a call between GMT and CST?
3 hours of the standard 9:00 am to 5:00 pm working day line up in both zones, from 2:00 pm GMT to 5:00 pm GMT. In Central that window reads 9:00 am to 12:00 pm. Outside it, one side is either not yet at their desk or already gone.
| GMT | CST | Working hours | Note |
|---|---|---|---|
| 2:00 pm | 9:00 am | both sides | afternoon in GMT, mid morning in Central |
| 3:00 pm | 10:00 am | both sides | afternoon in GMT, mid morning in Central |
| 4:00 pm | 11:00 am | both sides | afternoon in GMT, mid morning in Central |
Does daylight saving change GMT to CST?
Greenwich Mean Time does not move its clocks at all, so its UTC+0 offset holds every day of the year.
Central Time is currently on CDT and changes next on Sunday, November 1, 2026, when the clock falls back from 1:59 am to 1:00 am and the offset moves from UTC-5 to UTC-6.
Because the two sides do not move together, the answer to this conversion changes during the year. For part of the year the gap is 5 hours and for the rest it is 6 hours. The table above is built for today, not for an average day.
Is GMT ahead of or behind CST?
GMT is ahead of CST by 5 hours: when it is 12:00 pm in GMT, it is 7:00 am in Central. One wrinkle worth knowing: CST and CDT are two names for the same zone, not two zones. Central Time reads CST in winter and CDT in summer. When somebody types "gmt to cst" they nearly always mean the zone rather than the literal winter offset, so this page resolves GMT to Etc/GMT and CST to America/Chicago and applies whichever offset is genuinely in force on the day.
Greenwich Mean Time covers identical to UTC as a clock reading, and a separate thing as a standard. Central Time covers Chicago, Dallas, Houston and Winnipeg. The identifiers behind them are Etc/GMT and America/Chicago, which is what any calendar or scheduling system should be storing rather than a fixed number of hours.
Questions
- What is GMT in CST?
- GMT is 5 hours ahead of CST. 9:00 am GMT is 4:00 am CST.
- How many hours ahead is CST of GMT?
- CST is 5 hours behind GMT. That varies across the year, between 5 hours and 6 hours.
- What time is it in Central right now?
- 10:21 pm CDT on Thursday, September 24, 2026.
- When can GMT and Central meet during working hours?
- Between 2:00 pm and 5:00 pm GMT, which is 9:00 am to 12:00 pm CST.
- Does this account for daylight saving?
- Yes. Every reading is computed from the IANA database for the actual date, so GMT and CDT are the abbreviations genuinely in force today rather than a fixed assumption.
GMT to CST by the hour
Other conversions
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