Question 1

What is the time difference between GMT and CST?

Accepted Answer

Central Standard Time (CST) is 6 hours behind Greenwich Mean Time (GMT). Use the conversion table above to see the exact time for each hour.

Question 2

How do I convert GMT to CST?

Accepted Answer

To convert GMT to CST, subtract 6 hours from the GMT time. For example, 9:00 AM GMT is 3:00 AM CST.

Question 3

What time is it in CST when it's noon in GMT?

Accepted Answer

When it's 12:00 PM (noon) in GMT, it's 6:00 AM in CST. CST is 6 hours behind GMT.

Question 4

How many hours behind is CST from GMT?

Accepted Answer

CST is 6 hours behind GMT. This means when it's 9:00 AM in GMT, it's 3:00 AM in CST.

Question 5

Is CST ahead or behind GMT?

Accepted Answer

CST is behind GMT by 6 hours. Clocks in CST show an earlier time than GMT.

Question 6

Does GMT observe daylight saving time?

Accepted Answer

Yes, Greenwich Mean Time observes daylight saving time. During DST, the abbreviation changes to BST and clocks move forward by one hour.

Question 7

Does CST observe daylight saving time?

Accepted Answer

Yes, Central Standard Time observes daylight saving time. During DST, the abbreviation changes to CDT and clocks move forward by one hour.

Question 8

What is the best time to call from GMT to CST?

Accepted Answer

The best time for a call between GMT and CST is during overlapping business hours (9 AM – 5 PM) in both timezones. Check the color-coded conversion table above — green hours indicate business hours in both zones.

Question 9

When does daylight saving time change in GMT?

Accepted Answer

Daylight saving time transitions vary by year and region. Greenwich Mean Time observes DST, which typically shifts clocks forward by one hour in spring and back in fall. During DST transitions, the time difference between GMT and CST may temporarily change. Check our DST change calendar for exact dates.

Question 10

Do GMT and CST ever have the same time?

Accepted Answer

No, GMT and CST are always 6 hours apart. Both timezones observe DST, so the difference remains consistent.

Greenwich Mean Time (GMT)	Period	Central Standard Time (CST)	Period
12:00 AM	Night	6:00 PM-1d	Evening
1:00 AM	Night	7:00 PM-1d	Evening
2:00 AM	Night	8:00 PM-1d	Evening
3:00 AM	Night	9:00 PM-1d	Evening
4:00 AM	Night	10:00 PM-1d	Evening
5:00 AM	Night	11:00 PM-1d	Evening
6:00 AM	Morning	12:00 AM	Night
7:00 AM	Morning	1:00 AM	Night
8:00 AM	Morning	2:00 AM	Night
9:00 AM	Business	3:00 AM	Night
10:00 AM	Business	4:00 AM	Night
11:00 AM	Business	5:00 AM	Night
12:00 PM	Business	6:00 AM	Morning
1:00 PM	Business	7:00 AM	Morning
2:00 PM	Business	8:00 AM	Morning
3:00 PM	Business	9:00 AM	Business
4:00 PM	Business	10:00 AM	Business
5:00 PM	Business	11:00 AM	Business
6:00 PM	Evening	12:00 PM	Business
7:00 PM	Evening	1:00 PM	Business
8:00 PM	Evening	2:00 PM	Business
9:00 PM	Evening	3:00 PM	Business
10:00 PM	Evening	4:00 PM	Business
11:00 PM	Evening	5:00 PM	Business

GMT to CST Converter

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GMT to CST Conversion Table

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