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DateAlmanac

What is CST in GMT?

Greenwich Mean Time is 6 hours ahead

Central Time is on UTC−6:00 and Greenwich Mean Time is on UTC+0:00 right now. The gap changes during the year — see below.

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GMT — Greenwich Mean Time

8:00 am

GMT, Sat

Time in Chicago
2:28:55 AM
Time in Greenwich
8:28:55 AM
Difference
+6 h
Next clock change
March 14, 2027

When the difference changes

Central Time and Greenwich Mean Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:

  1. Now – March 14, 2027Greenwich Mean Time is 6 hours ahead
  2. March 14, 2027 – November 7, 2027Greenwich Mean Time is 5 hours ahead
  3. November 7, 2027 – onwardsGreenwich Mean Time is 6 hours ahead

Periods shorter than a day are not listed. Each zone changes at its own local time, so on a date when both move there are a few hours when the gap is briefly something else.

Daylight saving

Central Time

Sunday, March 14, 2027

Clocks go forward one hour — 2:00 am becomes 3:00 am local time, and the zone is on CDT after that.

Greenwich Mean Time

No clock changes

Greenwich Mean Time stays on GMT all year, so its offset from UTC never moves.

CST to GMT conversion table

Every hour of Saturday, November 7, 2026, converted from Central Time to Greenwich Mean Time. 6 of the 24 hours fall on a different calendar day in Greenwich, which is marked.

12:00 am CST
6:00 am GMT
1:00 am CST
7:00 am GMT
2:00 am CST
8:00 am GMT
3:00 am CST
9:00 am GMT
4:00 am CST
10:00 am GMT
5:00 am CST
11:00 am GMT
6:00 am CST
12:00 pm GMT
7:00 am CST
1:00 pm GMT
8:00 am CST
2:00 pm GMT
9:00 am CST
3:00 pm GMT
10:00 am CST
4:00 pm GMT
11:00 am CST
5:00 pm GMT
12:00 pm CST
6:00 pm GMT
1:00 pm CST
7:00 pm GMT
2:00 pm CST
8:00 pm GMT
3:00 pm CST
9:00 pm GMT
4:00 pm CST
10:00 pm GMT
5:00 pm CST
11:00 pm GMT
6:00 pm CST
12:00 am GMT+1 day
7:00 pm CST
1:00 am GMT+1 day
8:00 pm CST
2:00 am GMT+1 day
9:00 pm CST
3:00 am GMT+1 day
10:00 pm CST
4:00 am GMT+1 day
11:00 pm CST
5:00 am GMT+1 day

Scheduling between the two

Working hours overlap from 9:00 am to 12:00 pm CST, which is 3:00 pm to 6:00 pm GMT. Anything inside that window falls in the normal working day at both ends.

A note on CST: it can also mean China Standard Time (UTC+8) and Cuba Standard Time (UTC−5). This page means US Central Time.

Central Time (CST) is used in Dallas, Houston, Mexico City and Winnipeg

Greenwich Mean Time (GMT) is used in as a fixed UTC+0 offset. Note that the UK itself leaves GMT every summer — see British Time below.

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