Greenwich Mean Time
GMT means UTC throughout the year.
TIME ZONE CONVERTER
GMT to CST
Time Converter
Convert Greenwich Mean Time to Central Standard Time. Compare dates, seasonal differences and meeting hours.
GMT is 6h ahead of CST in 2026.
9 AM GMT = 3 AM CST
Selected date: November 3, 2026. Fixed abbreviations retain their stated UTC offsets.
THE QUICK REFERENCE
CSVGMT to CST conversion table
November 3, 2026 · Date changes are marked.
View the full 24-hour table
| GMT | CST |
|---|---|
| 12:00 AM | 6:00 PM -1 day |
| 1:00 AM | 7:00 PM -1 day |
| 2:00 AM | 8:00 PM -1 day |
| 3:00 AM | 9:00 PM -1 day |
| 4:00 AM | 10:00 PM -1 day |
| 5:00 AM | 11:00 PM -1 day |
| 6:00 AM | 12:00 AM |
| 7:00 AM | 1:00 AM |
| 8:00 AM | 2:00 AM |
| 9:00 AM | 3:00 AM |
| 10:00 AM | 4:00 AM |
| 11:00 AM | 5:00 AM |
| GMT | CST |
|---|---|
| 12:00 PM | 6:00 AM |
| 1:00 PM | 7:00 AM |
| 2:00 PM | 8:00 AM |
| 3:00 PM | 9:00 AM |
| 4:00 PM | 10:00 AM |
| 5:00 PM | 11:00 AM |
| 6:00 PM | 12:00 PM |
| 7:00 PM | 1:00 PM |
| 8:00 PM | 2:00 PM |
| 9:00 PM | 3:00 PM |
| 10:00 PM | 4:00 PM |
| 11:00 PM | 5:00 PM |
Starting with the CST working day
These examples start on 2026-11-03 in CST.
09:00 CST15:00 →GMT · 2026-11-03
17:00 CST23:00 →GMT · 2026-11-03
Which time-zone meaning are we using?
Central Standard Time
CST means UTC−06:00 throughout the year. Central Time follows regional clock rules and uses UTC−06:00 on your selected date.
Use CT for local civil time →Other meanings: China Standard Time.
ONE CLOCK TIME. THE WHOLE YEAR.
Year CSV09:00 GMT to CST throughout 2026
09:00 in GMT converts to 03:00 in CST on every date in 2026. The destination has the same calendar date.
Every calendar date is included, not just workdays. Date ranges include both endpoints. Based on IANA 2026e; future rules may change.
DON’T LOSE A DAY
When does GMT time become a different date in CST?
Your complete source day: 2026-11-03. Each range shows which destination date to use.
GMT · 2026-11-0300:00–06:00UTC
CST · 2026-11-0218:00–24:00UTC−06:00 Previous day
GMT · 2026-11-0306:00–24:00UTC
CST · 2026-11-0300:00–18:00UTC−06:00 Same date
Range starts are included; ends are excluded. 24:00 means midnight at the end of that date. Repeated hours appear separately with their UTC offsets. The strip is proportional to elapsed time.
THE BIGGER PICTURE
2026Some things stay in sync.
The difference between GMT and CST stays the same throughout 2026.
JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC
−6h
Neither selected clock changes its UTC offset during 2026.
CLOCK CHANGES
No upcoming clock adjustment
Both selected labels are fixed offsets, so seasonal clock changes do not alter this conversion.
PLAN BEYOND A SINGLE DAY
Daily CSVGMT–CST working hours through 2026
Every date calculated with your working windows. 261 selected GMT workdays; public holidays are not applied.
Least shared time2h
Most common2h
Most shared time2h
Days without a 60-min slot0 / 261
A start time that survives the whole year.
Start a 60-minute meeting in GMT 15:00–16:00.
These starts fit both working windows on every selected GMT workday in 2026, using a 15-minute start grid. The end of each range is the last valid start.
GMT: 09:00–17:00, Mon, Tue, Wed, Thu, Fri. CST: 09:00–17:00, Mon, Tue, Wed, Thu, Fri.
Calculation details and repeated hours
Overnight shifts belong to their start weekday. Host workday means the source calendar date. Repeated local times use the first occurrence.
THE DETAILS THAT MATTER
GMT to CST: useful answers
Is CST the same as local city time?
CST is fixed at UTC−06:00. GMT to Chicago (CT) uses regional rules instead. On 2026-11-03, 09:00 at the source becomes 03:00 at the destination (CST). Choose the local-city option above when that is the clock you mean.
Which cities match CST throughout 2026?
Mexico City, Mexico; Guatemala City, Guatemala; Managua, Nicaragua; Tegucigalpa, Honduras keep the same UTC−06:00 offset as fixed CST throughout 2026 under the published rules. Matching an offset does not mean every place uses the abbreviation CST.
Does the GMT–CST time difference change in 2026?
The difference stays constant throughout 2026: CST is 6h behind compared with GMT.
Does this conversion change the calendar date?
09:00 in GMT on 2026-11-03 is 03:00 in CST on 2026-11-03. This selected time stays on the same date in both places. Other times can cross midnight.
Can GMT and CST meet during working hours?
Your selected working windows share 2h on 2026-11-03. The planner above checks the whole meeting duration and shows suitable start times. Edit the windows to match your team.
Related time-zone meanings and conversions
Calculated with IANA 2026e. Working hours are your preferences; public holidays and calendar availability are not included. Our methodology