CETtoGMTCentral European Time to Greenwich Mean Time
CET
Central European Time (GMT+1)GMT
Greenwich Mean Time (GMT)Mutual Working Window: 7 Overlapping Hours
Recommended calling window between CET and GMT
Both locations share 7 overlapping standard business hours (9:00 AM – 5:00 PM). This is the premier window for real-time video conferences, corporate calls, and instant collaboration without outside-hours disruption.
24-Hour Schedule Conversion Matrix
Compare every hour of the day between CET and GMT.
| CET Time (Central European Time) | GMT Time (Greenwich Mean Time) | Status & Recommendation |
|---|---|---|
| 00:00AM | 23:00PM-1 day | ⚪ Outside Work Hours |
| 01:00AM | 00:00AM | ⚪ Outside Work Hours |
| 02:00AM | 01:00AM | ⚪ Outside Work Hours |
| 03:00AM | 02:00AM | ⚪ Outside Work Hours |
| 04:00AM | 03:00AM | ⚪ Outside Work Hours |
| 05:00AM | 04:00AM | ⚪ Outside Work Hours |
| 06:00AM | 05:00AM | ⚪ Outside Work Hours |
| 07:00AM | 06:00AM | ⚪ Outside Work Hours |
| 08:00AM | 07:00AM | ⚪ Outside Work Hours |
| 09:00AM | 08:00AM | 🟡 Feasible (Shoulder Hour) |
| 10:00AM | 09:00AM | 🟢 Ideal Meeting Window |
| 11:00AM | 10:00AM | 🟢 Ideal Meeting Window |
| 12:00PM | 11:00AM | 🟢 Ideal Meeting Window |
| 13:00PM | 12:00PM | 🟢 Ideal Meeting Window |
| 14:00PM | 13:00PM | 🟢 Ideal Meeting Window |
| 15:00PM | 14:00PM | 🟢 Ideal Meeting Window |
| 16:00PM | 15:00PM | 🟢 Ideal Meeting Window |
| 17:00PM | 16:00PM | ⚪ Outside Work Hours |
| 18:00PM | 17:00PM | ⚪ Outside Work Hours |
| 19:00PM | 18:00PM | ⚪ Outside Work Hours |
| 20:00PM | 19:00PM | ⚪ Outside Work Hours |
| 21:00PM | 20:00PM | ⚪ Outside Work Hours |
| 22:00PM | 21:00PM | ⚪ Outside Work Hours |
| 23:00PM | 22:00PM | ⚪ Outside Work Hours |
Frequently Asked Questions
What is the time difference between CET and GMT?
GMT is 1 hour behind CET. When it is 12:00 PM (noon) in CET, the current synchronized time in GMT is 11:00 AM.
What are the overlapping working hours between CET and GMT?
There are 7 overlapping standard business hours (9:00 AM – 5:00 PM) between CET and GMT. The optimal scheduling window is 10:00 AM – 5:00 PM in CET (9:00 AM – 4:00 PM in GMT).
Does daylight saving time affect the conversion between CET and GMT?
Yes. Both CET and GMT observe seasonal daylight saving time shifts.
What regions and major cities observe CET and GMT?
CET (Central European Time) is primarily observed across Central Europe (Germany, France, Italy, Spain, Netherlands, Poland) (key hubs include Paris, Berlin, Rome, Madrid). GMT (Greenwich Mean Time) is observed across Western Europe & West Africa (United Kingdom, Ireland, Portugal, Ghana) (key hubs include London, Dublin, Lisbon, Accra).
What is 9:00 AM CET in GMT?
9:00 AM in CET corresponds to 8:00 AM in GMT. You can cross-reference every hour of the day in the 24-hour visual schedule table above.
Which time zone is ahead, CET or GMT?
CET is ahead by 1 hour.