CST to GST — Gulf Standard Time is 10 hours ahead
Gulf Standard Time (GST) is 10 hours ahead of Central Time (CST) while both are on standard time. Once daylight saving starts the gap becomes 9 hours ahead, so any recurring meeting between these two regions moves by an hour twice a year.
Standard time
10 hours aheadApplies while neither zone is on daylight saving — broadly November to March in the northern hemisphere.
Daylight saving
9 hours aheadApplies while the clocks are forward. This pair does not keep a constant gap, so check the date.
Convert a time
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CST to GST — every hour
Both columns are computed from the IANA database, so they follow the real transition dates.
| CST | GST — standard | GST — daylight saving |
|---|---|---|
| 12:00 am | 10:00 am | 9:00 am |
| 1:00 am | 11:00 am | 10:00 am |
| 2:00 am | 12:00 pm | 11:00 am |
| 3:00 am | 1:00 pm | 12:00 pm |
| 4:00 am | 2:00 pm | 1:00 pm |
| 5:00 am | 3:00 pm | 2:00 pm |
| 6:00 am | 4:00 pm | 3:00 pm |
| 7:00 am | 5:00 pm | 4:00 pm |
| 8:00 am | 6:00 pm | 5:00 pm |
| 9:00 am | 7:00 pm | 6:00 pm |
| 10:00 am | 8:00 pm | 7:00 pm |
| 11:00 am | 9:00 pm | 8:00 pm |
| 12:00 pm | 10:00 pm | 9:00 pm |
| 1:00 pm | 11:00 pm | 10:00 pm |
| 2:00 pm | 12:00 am (next day) | 11:00 pm |
| 3:00 pm | 1:00 am (next day) | 12:00 am (next day) |
| 4:00 pm | 2:00 am (next day) | 1:00 am (next day) |
| 5:00 pm | 3:00 am (next day) | 2:00 am (next day) |
| 6:00 pm | 4:00 am (next day) | 3:00 am (next day) |
| 7:00 pm | 5:00 am (next day) | 4:00 am (next day) |
| 8:00 pm | 6:00 am (next day) | 5:00 am (next day) |
| 9:00 pm | 7:00 am (next day) | 6:00 am (next day) |
| 10:00 pm | 8:00 am (next day) | 7:00 am (next day) |
| 11:00 pm | 9:00 am (next day) | 8:00 am (next day) |
Questions people ask
10 hours ahead during standard time, and 9 hours ahead while daylight saving is running.
No. One zone shifts and the other does not, or they shift on different dates, which is why the difference is not a single fixed number.
Standard working days do not overlap at all. One side will need to take the call early or late, so alternate who makes the sacrifice.
Booking something recurring?
A fixed clock time drifts when either side changes its clocks. Our guides explain how to stop that happening.