UTCtoGMTCoordinated Universal Time to Greenwich Mean Time
UTC
Coordinated Universal Time (UTC)GMT
Greenwich Mean Time (GMT)Mutual Working Window: 8 Overlapping Hours
Recommended calling window between UTC and GMT
Both locations share 8 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 UTC and GMT.
| UTC Time (Coordinated Universal Time) | GMT Time (Greenwich Mean Time) | Status & Recommendation |
|---|---|---|
| 00:00AM | 00:00AM | ⚪ Outside Work Hours |
| 01:00AM | 01:00AM | ⚪ Outside Work Hours |
| 02:00AM | 02:00AM | ⚪ Outside Work Hours |
| 03:00AM | 03:00AM | ⚪ Outside Work Hours |
| 04:00AM | 04:00AM | ⚪ Outside Work Hours |
| 05:00AM | 05:00AM | ⚪ Outside Work Hours |
| 06:00AM | 06:00AM | ⚪ Outside Work Hours |
| 07:00AM | 07:00AM | ⚪ Outside Work Hours |
| 08:00AM | 08:00AM | ⚪ Outside Work Hours |
| 09:00AM | 09:00AM | 🟢 Ideal Meeting Window |
| 10:00AM | 10:00AM | 🟢 Ideal Meeting Window |
| 11:00AM | 11:00AM | 🟢 Ideal Meeting Window |
| 12:00PM | 12:00PM | 🟢 Ideal Meeting Window |
| 13:00PM | 13:00PM | 🟢 Ideal Meeting Window |
| 14:00PM | 14:00PM | 🟢 Ideal Meeting Window |
| 15:00PM | 15:00PM | 🟢 Ideal Meeting Window |
| 16:00PM | 16:00PM | 🟢 Ideal Meeting Window |
| 17:00PM | 17:00PM | ⚪ Outside Work Hours |
| 18:00PM | 18:00PM | ⚪ Outside Work Hours |
| 19:00PM | 19:00PM | ⚪ Outside Work Hours |
| 20:00PM | 20:00PM | ⚪ Outside Work Hours |
| 21:00PM | 21:00PM | ⚪ Outside Work Hours |
| 22:00PM | 22:00PM | ⚪ Outside Work Hours |
| 23:00PM | 23:00PM | ⚪ Outside Work Hours |
Frequently Asked Questions
What is the time difference between UTC and GMT?
GMT and UTC are in the same time offset. When it is 12:00 PM (noon) in UTC, the current synchronized time in GMT is 12:00 PM.
What are the overlapping working hours between UTC and GMT?
There are 8 overlapping standard business hours (9:00 AM – 5:00 PM) between UTC and GMT. The optimal scheduling window is 9:00 AM – 5:00 PM in UTC (9:00 AM – 5:00 PM in GMT).
Does daylight saving time affect the conversion between UTC and GMT?
Yes. GMT observes daylight saving shifts (BST), shifting the offset difference by 1 hour between summer and winter while UTC stays on fixed standard time year-round.
What regions and major cities observe UTC and GMT?
UTC (Coordinated Universal Time) is primarily observed across International High-Precision Civil & Scientific Standard (key hubs include Universal Aviation, Scientific Data, Financial Exchanges, Cloud Infrastructure). 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 UTC in GMT?
9:00 AM in UTC corresponds to 9:00 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, UTC or GMT?
UTC and GMT are in the same time offset.