Timezone conversion
GMT to CST Time — Convert Greenwich Mean Time to Central Standard Time (US)
CST is currently 5 hours behind GMT. The gap shifts across the year: around January CST is 6 hours behind GMT, and around July it is 5 hours behind GMT, because one or both zones observe daylight saving.
CST is currently 5 hours behind GMT.
Abbreviation disambiguation
GMT is equivalent to UTC for everyday use. In the UK it also refers to the winter (non-daylight-saving) time; in summer the UK moves to BST (UTC+1).
On Clockjumper, CST refers to US Central Standard Time (UTC−6). The same three letters are also used for China Standard Time (UTC+8) and Cuba Standard Time (UTC−5) — check the city or UTC offset to be sure which is meant.
Interactive converter
Select a city to see its local time.
Select both cities to see the converted time.
Full GMT to CST conversion table
| GMT | CST |
|---|---|
| 12:00 AM | 7:00 PM(previous day) |
| 1:00 AM | 8:00 PM(previous day) |
| 2:00 AM | 9:00 PM(previous day) |
| 3:00 AM | 10:00 PM(previous day) |
| 4:00 AM | 11:00 PM(previous day) |
| 5:00 AM | 12:00 AM |
| 6:00 AM | 1:00 AM |
| 7:00 AM | 2:00 AM |
| 8:00 AM | 3:00 AM |
| 9:00 AM | 4:00 AM |
| 10:00 AM | 5:00 AM |
| 11:00 AM | 6:00 AM |
| 12:00 PM | 7:00 AM |
| 1:00 PM | 8:00 AM |
| 2:00 PM | 9:00 AM |
| 3:00 PM | 10:00 AM |
| 4:00 PM | 11:00 AM |
| 5:00 PM | 12:00 PM |
| 6:00 PM | 1:00 PM |
| 7:00 PM | 2:00 PM |
| 8:00 PM | 3:00 PM |
| 9:00 PM | 4:00 PM |
| 10:00 PM | 5:00 PM |
| 11:00 PM | 6:00 PM |
Daylight saving and how the gap changes
Around January CST is 6 hours behind GMT. Around July it is 5 hours behind GMT. That swing comes from one or both zones observing daylight saving on different schedules — the converter above always reflects the correct offset for the date you pick.
Frequently asked questions
- Is CST ahead of or behind GMT right now?
- CST is currently 5 hours behind GMT.
- What is the current GMT to CST time difference?
- Right now the gap is 5 hours — CST is 5 hours behind GMT.
- Does the GMT → CST offset change during the year?
- Yes. Around January CST is 6 hours behind GMT; around July it is 5 hours behind GMT. The converter above always reflects the correct offset for the date you pick.
- Does GMT observe daylight saving time?
- No — Greenwich Mean Time stays at a fixed UTC offset year-round.
- Does CST observe daylight saving time?
- CST is itself the standard-time form. Central Standard Time (US) is in force at UTC-6 through the winter months; outside that window the same zone is on CDT (UTC-5).
- What time is 3 AM GMT in CST?
- 3:00 AM GMT is 10:00 PM (previous day) CST.
- What time is 8 AM GMT in CST?
- 8:00 AM GMT is 3:00 AM CST.
- What time is 9 AM GMT in CST?
- 9:00 AM GMT is 4:00 AM CST.
- What time is 10 AM GMT in CST?
- 10:00 AM GMT is 5:00 AM CST.
- What time is 11 AM GMT in CST?
- 11:00 AM GMT is 6:00 AM CST.
- What time is 12 PM (noon) GMT in CST?
- 12:00 PM GMT is 7:00 AM CST.
- What time is 2 PM GMT in CST?
- 2:00 PM GMT is 9:00 AM CST.
- What time is 3 PM GMT in CST?
- 3:00 PM GMT is 10:00 AM CST.
- What time is 4 PM GMT in CST?
- 4:00 PM GMT is 11:00 AM CST.
- What time is 5 PM GMT in CST?
- 5:00 PM GMT is 12:00 PM CST.
- What time is 9 PM GMT in CST?
- 9:00 PM GMT is 4:00 PM CST.
- What time is 10 PM GMT in CST?
- 10:00 PM GMT is 5:00 PM CST.
- When is the best time to schedule a call between GMT and CST?
- The working-hours overlap (09:00–17:00 in both zones) runs roughly 2:00 PM – 5:00 PM GMT (≈ 3 hours). The midpoint of that window — 3:30 PM GMT, 10:30 AM CST — is the safest single slot to propose for a live call.
- What time zone does GMT refer to?
- GMT refers to Greenwich Mean Time (IANA: UTC).
- What time zone does CST refer to?
- CST refers to Central Standard Time (US) (IANA: America/Chicago).
- Is GMT on this page the same as other zones that share the letters "GMT"?
- GMT is equivalent to UTC for everyday use. In the UK it also refers to the winter (non-daylight-saving) time; in summer the UK moves to BST (UTC+1).
- Is CST on this page the same as other zones that share the letters "CST"?
- On Clockjumper, CST refers to US Central Standard Time (UTC−6). The same three letters are also used for China Standard Time (UTC+8) and Cuba Standard Time (UTC−5) — check the city or UTC offset to be sure which is meant.