CST to GMT time
The UK is six hours ahead of US Central Time in a typical week: 9:00 AM in Chicago, Dallas or Minneapolis is 3:00 PM in London. Because the US and the UK change clocks on different weekends, the lead drops to five hours for about four weeks a year.
Convert the other way: GMT → CST
Planning from Texas and the Midwest
From the Central zone, London's working day is mostly over before lunch. A Dallas team that starts at 8:00 AM has until about 11:00 AM to reach London colleagues before they log off at 5:00 PM. Anything that needs a UK reply the same day should go out first thing; anything sent after 11:00 AM Central will be answered the next morning, around 2:00–3:00 AM Central.
Deadlines expressed in UK time land early in the Central zone. A noon GMT closing time for a tender or a university application is 6:00 AM in Chicago, and "by close of business London" means 11:00 AM Central.
CST to GMT conversion table
Every hour of the day, using today's offsets (daylight saving is applied automatically).
| CST | GMT |
|---|---|
| 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 |
| CST | GMT |
|---|---|
| 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 | 12:00 AM+1 |
| 7:00 PM | 1:00 AM+1 |
| 8:00 PM | 2:00 AM+1 |
| 9:00 PM | 3:00 AM+1 |
| 10:00 PM | 4:00 AM+1 |
| 11:00 PM | 5:00 AM+1 |
Working hours that overlap (9:00–17:00 on both sides)
CST 6 PM–8 PM
Daylight saving time
- Central TimeCST / CDT
UTC−6 in winter, UTC−5 in summer
US Central states
- Greenwich Mean TimeGMT / BST
UTC+0 in winter, UTC+1 in summer
United Kingdom, Ireland, Portugal
Overnight flights and breakfast football
Dallas–Fort Worth and Chicago O'Hare both have daily nonstops to Heathrow, mostly departing in the late afternoon or evening. A 6:00 PM departure from O'Hare spends about eight hours in the air and arrives at Heathrow around 8:00 AM London time; from DFW the flight is closer to nine and a half hours.
Premier League Saturdays start early in the middle of the country: the 12:30 PM UK match is 6:30 AM Central and the 3:00 PM games kick off at 9:00 AM. To convert any other time or date, use the time zone converter.
Other conversions with these zones
Frequently asked questions
- What is 9 AM Central time in London?
- 3:00 PM in London in a normal week, or 2:00 PM during the weeks when the two countries are out of sync on daylight saving.
- How late can I email London from Chicago and expect a same-day reply?
- Around 10:00 or 11:00 AM Central, which is 4:00–5:00 PM in London. Later messages are usually answered the next UK morning.
- When does a Saturday 3 PM UK football match start in Texas?
- At 9:00 AM Central, or 10:00 AM in the brief March and late-October weeks when the US is on daylight time and the UK is not.
- Is the UK ahead of the US Central zone in summer as well?
- Yes. In summer the UK uses BST (UTC+1) and Chicago uses CDT (UTC−5), so the UK stays six hours ahead.
- What time does a flight from Chicago land in London?
- An evening departure arrives the next morning: leaving O'Hare at 6:00 PM puts you at Heathrow around 8:00 AM London time.