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

When it is 12:00 noon in Greenwich Mean Time (GMT), it is 06:00 (Mon) in Central Standard Time (CST) right now. The exact value can change by an hour at daylight saving transitions, so always compute against today's date.

Are CST and GMT the same time zone?

No. CST (Central Standard Time) and GMT (Greenwich Mean Time) are distinct zones with different UTC offsets. Right now CST is UTC-06:00 and GMT is UTC+00:00.

How many hours apart are CST and GMT?

Right now CST is 6 hours behind GMT. The gap can shift by an hour when either zone enters or leaves daylight saving, which is why the 24-hour table above is computed against today's date.

Does CST observe daylight saving time?

Yes. Central Standard Time shifts forward an hour in spring and back in autumn, so the wall clock in Chicago, Dallas and Houston moves with the seasons. The IANA tzdata handles the exact dates for you.

How do I schedule a call between CST and GMT?

Pick a slot where both ends are inside their working day. The best-meeting-times strip above shows the windows where both CST and GMT sit in 9-to-5 business hours today. If you need to commit to a specific minute, open the converter. It handles daylight saving transitions automatically. Note that CST observes DST while GMT does not, so the gap shifts by an hour twice a year.

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

When it is 12:00 noon in Greenwich Mean Time (GMT), it is 06:00 (Mon) in Central Standard Time (CST) right now. The exact value can change by an hour at daylight saving transitions, so always compute against today's date.

Are CST and GMT the same time zone?

No. CST (Central Standard Time) and GMT (Greenwich Mean Time) are distinct zones with different UTC offsets. Right now CST is UTC-06:00 and GMT is UTC+00:00.

How many hours apart are CST and GMT?

Right now CST is 6 hours behind GMT. The gap can shift by an hour when either zone enters or leaves daylight saving, which is why the 24-hour table above is computed against today's date.

Does CST observe daylight saving time?

Yes. Central Standard Time shifts forward an hour in spring and back in autumn, so the wall clock in Chicago, Dallas and Houston moves with the seasons. The IANA tzdata handles the exact dates for you.

How do I schedule a call between CST and GMT?

Pick a slot where both ends are inside their working day. The best-meeting-times strip above shows the windows where both CST and GMT sit in 9-to-5 business hours today. If you need to commit to a specific minute, open the converter. It handles daylight saving transitions automatically. Note that CST observes DST while GMT does not, so the gap shifts by an hour twice a year.

Time zone comparison

CST vs GMT time zone comparison

Central Standard Time (CST, UTC-06:00) vs Greenwich Mean Time (GMT, UTC+00:00). Right now CST is 6h behind GMT. CST is used in Chicago, Dallas and Houston while GMT covers United Kingdom (winter), West Africa, Iceland. Use the 24-hour grid below to find a meeting slot both sides will tolerate.

Right now in CST

--:--:--

UTC

Right now in GMT

--:--:--

UTC

Heads up: these zones diverge on daylight saving.

CST observes DST while GMT does not, so the gap shifts by an hour twice a year. In January the difference is 6h, in July it is 5h. If you are scheduling across the spring or autumn transitions, double-check the date.

Best meeting windows today

Hours where both sides sit inside 9-to-5 business hours.

Both in business hours
09:00 CST
15:00 GMT
Both in business hours
10:00 CST
16:00 GMT

24-hour comparison

Each row is one hour. Green rows are when both sides are inside 9 AM to 5 PM.

Convert exact time →

24-hour wall-clock comparison between Central Standard Time and Greenwich Mean Time, with business-hour overlap highlighted.
Hour	CST (Central Standard Time)	GMT (Greenwich Mean Time)	Overlap
12 AM	00:00Mon	06:00Mon	No overlap
1 AM	01:00Mon	07:00Mon	No overlap
2 AM	02:00Mon	08:00Mon	No overlap
3 AM	03:00Mon	09:00Mon	GMT only
4 AM	04:00Mon	10:00Mon	GMT only
5 AM	05:00Mon	11:00Mon	GMT only
6 AM	06:00Mon	12:00Mon	GMT only
7 AM	07:00Mon	13:00Mon	GMT only
8 AM	08:00Mon	14:00Mon	GMT only
9 AM	09:00Mon	15:00Mon	Business overlap
10 AM	10:00Mon	16:00Mon	Business overlap
11 AM	11:00Mon	17:00Mon	CST only
12 PM	12:00Mon	18:00Mon	CST only
1 PM	13:00Mon	19:00Mon	CST only
2 PM	14:00Mon	20:00Mon	CST only
3 PM	15:00Mon	21:00Mon	CST only
4 PM	16:00Mon	22:00Mon	CST only
5 PM	17:00Mon	23:00Mon	No overlap
6 PM	18:00Mon	00:00Tue	No overlap
7 PM	19:00Mon	01:00Tue	No overlap
8 PM	20:00Mon	02:00Tue	No overlap
9 PM	21:00Mon	03:00Tue	No overlap
10 PM	22:00Mon	04:00Tue	No overlap
11 PM	23:00Mon	05:00Tue	No overlap

How CST and GMT compare

Central Standard Time (CST) sits at UTC-06:00 today, while Greenwich Mean Time (GMT) is at UTC+00:00. The current gap is 6 hours, with CST behind GMT. In practical terms, if your morning starts at 9 AM in Chicago, your counterpart in United Kingdom (winter), West Africa, Iceland is seeing 15:00 on their own watch at that exact moment.

CST is the working clock for Chicago, Dallas and Houston. CST also refers to China Standard Time (Asia/Shanghai) and Cuba Standard Time. North American intent dominates search volume. GMT covers United Kingdom (winter), West Africa, Iceland. GMT and UTC agree to the second in practice. The UK uses GMT in winter and BST in summer. If your team is split between these two regions, the table above is the quickest way to spot the daily overlap window without doing the offset arithmetic in your head.

Daylight saving matters here. Central Standard Time shifts forward an hour on the second Sunday of March (US) or the last Sunday of March (Europe) and back on the first Sunday of November or last Sunday of October. Greenwich Mean Time stays on a fixed offset year-round. The IANA tzdata baked into this page handles every transition automatically, so the table reflects the correct wall-clock times for today's date. For dates further out, use the converter linked above and pick the target date explicitly.

Common scheduling traps are easy to avoid here. Pick a wall-clock time on one side, read the matching wall-clock on the other from the table, and write both into the calendar invite, never just the difference. If the meeting falls in the week of a DST changeover and one of these zones shifts, the absolute clock will drift by an hour from what the recipient expects. The table is computed for today's date, so for a future meeting open the converter linked above and pick the exact date.

One last note for asynchronous teams: business-hour overlap is the wrong metric for handoff workflows. If you operate on a follow-the-sun model, you actually want zero overlap, with one team logging off as the other starts. CST and GMT differ by 6 hours, which gives you partial coverage. Add a zone in between if you want full 24-hour rotation.