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GST to CST: convert Gulf Standard Time to Central Time

In January, CST is 10 hours behind GST. In July it is 9 hours behind. The gap moves because the two regions handle daylight saving differently.

GST also abbreviates South Georgia Time (UTC-2). These pages use the Gulf meaning.

CST also abbreviates China Standard Time (UTC+8) and Cuba Standard Time (UTC-5). These pages use the North American meaning.

One instant, two local clocks

Drag one day across both zones

Shared instant12:00 UTC
Difference nowCST is 10 hours behind
GSTGulf Standard Time
16:00Thu, Jan 15
CSTCentral Time
06:00Thu, Jan 15
Approximate daylight 09:00 to 17:00 Selected local time

Both lanes show the same instant. Local dates, daylight, and offsets come from each IANA zone on the selected date, so daylight saving changes are included.

Right now

GST: Gulf Standard Time

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CST: Central Time

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Local times come from your browser's IANA time zone data.

GST to CST hour by hour

Two columns because the gap changes with daylight saving: use the January column roughly November to mid-March, the July column mid-March to October. Exact switch dates vary by year.

GSTCST (January)CST (July)
12:00 AM2:00 PM (prev day)3:00 PM (prev day)
1:00 AM3:00 PM (prev day)4:00 PM (prev day)
2:00 AM4:00 PM (prev day)5:00 PM (prev day)
3:00 AM5:00 PM (prev day)6:00 PM (prev day)
4:00 AM6:00 PM (prev day)7:00 PM (prev day)
5:00 AM7:00 PM (prev day)8:00 PM (prev day)
6:00 AM8:00 PM (prev day)9:00 PM (prev day)
7:00 AM9:00 PM (prev day)10:00 PM (prev day)
8:00 AM10:00 PM (prev day)11:00 PM (prev day)
9:00 AM11:00 PM (prev day)12:00 AM
10:00 AM12:00 AM1:00 AM
11:00 AM1:00 AM2:00 AM
12:00 PM2:00 AM3:00 AM
1:00 PM3:00 AM4:00 AM
2:00 PM4:00 AM5:00 AM
3:00 PM5:00 AM6:00 AM
4:00 PM6:00 AM7:00 AM
5:00 PM7:00 AM8:00 AM
6:00 PM8:00 AM9:00 AM
7:00 PM9:00 AM10:00 AM
8:00 PM10:00 AM11:00 AM
9:00 PM11:00 AM12:00 PM
10:00 PM12:00 PM1:00 PM
11:00 PM1:00 PM2:00 PM

Scheduling a call between GST and CST

Standard business hours (9:00 AM to 5:00 PM) do not overlap in January: daytime in Gulf Standard Time falls outside the working day in Central Time, so one side needs an early morning or late evening.

In July standard business hours do not overlap at all.

CST to GST (reverse)Open the full converter

More GST conversions

Offsets are computed from the IANA time zone database for January 15 and July 15 of the current year. GST here means Gulf Standard Time (United Arab Emirates and Oman); CST means Central Time (United States and Canada).