Offset
The time difference between Greenwich Mean Time and Central Time is 6 hours.
Greenwich Mean Time (BST) is ahead of Central Time (CDT).
BST: UTC+1
CDT: UTC-5
Both zones are currently observing daylight saving time.
When to schedule
Business-hours overlap: 3 PM–5 PM in Greenwich Mean Time (9 AM–11 AM in Central Time).
Both teams are in working hours during this window on weekdays.
Suggested time: 4:00 PM Greenwich Mean Time (10:00 AM Central Time).
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United Kingdom
- Good FridayFri, Apr 3
- Early May Bank HolidayMon, May 4
- Spring Bank HolidayMon, May 25
- Christmas DayFri, Dec 25
- St. Stephen's DayMon, Dec 28
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
About these zones
Greenwich Mean Time is also known as GMT, or BST. To call United Kingdom, dial +44.
Central Time is also known as CST, or CDT. To call United States, dial +1.
Central Time is approximately 3,950 miles northwest of Greenwich Mean Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| GMT | CST | Day |
|---|---|---|
| 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 | Same day |
| 7:00 am | 1:00 am | Same day |
| 8:00 am | 2:00 am | Same day |
| 9:00 am | 3:00 am | Same day |
| 10:00 am | 4:00 am | Same day |
| 11:00 am | 5:00 am | Same day |
| 12:00 pm | 6:00 am | Same day |
| 1:00 pm | 7:00 am | Same day |
| 2:00 pm | 8:00 am | Same day |
| 3:00 pm | 9:00 am | Same day |
| 4:00 pm | 10:00 am | Same day |
| 5:00 pm | 11:00 am | Same day |
| 6:00 pm | 12:00 pm | Same day |
| 7:00 pm | 1:00 pm | Same day |
| 8:00 pm | 2:00 pm | Same day |
| 9:00 pm | 3:00 pm | Same day |
| 10:00 pm | 4:00 pm | Same day |
| 11:00 pm | 5:00 pm | Same day |
Daylight saving time
Both zones observe daylight saving time, but they transition on different dates.
Greenwich Mean Time: next transition on Sunday, October 25, 2026.
Central Time: next transition on Sunday, November 1, 2026.
For approximately 7 days between transitions, the offset between Greenwich Mean Time and Central Time differs from its typical value. Recurring meetings during this window will shift by one hour.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:10 AM
- Sunset
- 9:05 PM
- Day length
- 15h 55m
- Sunrise
- 5:35 AM
- Sunset
- 8:20 PM
- Day length
- 14h 45m
Daylight overlap: 9h 30m — 11:35 AM–9:05 PM in Greenwich Mean Time (5:35 AM–3:05 PM in Central Time). Both locations are in daylight during this window.
Cities in these zones
Cities in Greenwich Mean Time
Cities in Central Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Greenwich Mean Time
- LCY
- LGW
- LHR
- LTN
- STN
- BHX
- EMA
- GLA
- PIK
- LBA
Airports in Central Time
- GYY
- MDW
- ORD
- HOU
- IAH
- SAT
- DAL
- DFW
- AUS
- BNA
Related conversions
Common conversions
- What is 9:00 am GMT in CST?
- 9:00 am GMT is 3:00 am CST.
- What is 12:00 pm GMT in CST?
- 12:00 pm GMT is 6:00 am CST.
- What is 12:30 pm GMT in CST?
- 12:30 pm GMT is 6:30 am CST.
- What is 2:00 pm GMT in CST?
- 2:00 pm GMT is 8:00 am CST.
- What is 5:00 pm GMT in CST?
- 5:00 pm GMT is 11:00 am CST.
- What is 11:30 pm GMT in CST?
- 11:30 pm GMT is 5:30 pm CST.