GMTtoSGTGreenwich Mean Time to Singapore Time
GMT
Greenwich Mean Time (GMT)SGT
Singapore Time (GMT+8)Feasible Shoulder Hours Window
Recommended calling window between GMT and SGT
There are no overlapping 9-to-5 working hours between GMT and SGT. The optimal compromise window falls during morning/evening shoulder periods (7:00 AM – 9:00 PM) when participants in both locations are awake.
24-Hour Schedule Conversion Matrix
Compare every hour of the day between GMT and SGT.
| GMT Time (Greenwich Mean Time) | SGT Time (Singapore Time) | Status & Recommendation |
|---|---|---|
| 00:00AM | 08:00AM | ⚪ Outside Work Hours |
| 01:00AM | 09:00AM | ⚪ Outside Work Hours |
| 02:00AM | 10:00AM | ⚪ Outside Work Hours |
| 03:00AM | 11:00AM | ⚪ Outside Work Hours |
| 04:00AM | 12:00PM | ⚪ Outside Work Hours |
| 05:00AM | 13:00PM | ⚪ Outside Work Hours |
| 06:00AM | 14:00PM | ⚪ Outside Work Hours |
| 07:00AM | 15:00PM | ⚪ Outside Work Hours |
| 08:00AM | 16:00PM | ⚪ Outside Work Hours |
| 09:00AM | 17:00PM | 🟡 Feasible (Shoulder Hour) |
| 10:00AM | 18:00PM | 🟡 Feasible (Shoulder Hour) |
| 11:00AM | 19:00PM | 🟡 Feasible (Shoulder Hour) |
| 12:00PM | 20:00PM | 🟡 Feasible (Shoulder Hour) |
| 13:00PM | 21:00PM | ⚪ Outside Work Hours |
| 14:00PM | 22:00PM | ⚪ Outside Work Hours |
| 15:00PM | 23:00PM | ⚪ Outside Work Hours |
| 16:00PM | 00:00AM | ⚪ Outside Work Hours |
| 17:00PM | 01:00AM | ⚪ Outside Work Hours |
| 18:00PM | 02:00AM | ⚪ Outside Work Hours |
| 19:00PM | 03:00AM | ⚪ Outside Work Hours |
| 20:00PM | 04:00AM | ⚪ Outside Work Hours |
| 21:00PM | 05:00AM | ⚪ Outside Work Hours |
| 22:00PM | 06:00AM | ⚪ Outside Work Hours |
| 23:00PM | 07:00AM | ⚪ Outside Work Hours |
Frequently Asked Questions
What is the time difference between GMT and SGT?
SGT is 8 hours ahead of GMT. When it is 12:00 PM (noon) in GMT, the current synchronized time in SGT is 8:00 PM.
What are the overlapping working hours between GMT and SGT?
Due to the timezone separation, standard 9-to-5 working shifts do not overlap. The recommended compromise window falls during morning/evening shoulder periods (7:00 AM – 1:00 PM in GMT = 3:00 PM – 9:00 PM in SGT).
Does daylight saving time affect the conversion between GMT and SGT?
Yes. GMT observes daylight saving shifts, moving the offset by 1 hour on scheduled transition dates.
What regions and major cities observe GMT and SGT?
GMT (Greenwich Mean Time) is primarily observed across Western Europe & West Africa (United Kingdom, Ireland, Portugal, Ghana) (key hubs include London, Dublin, Lisbon, Accra). SGT (Singapore Time) is observed across Southeast Asia (Singapore & Malaysia) (key hubs include Singapore, Kuala Lumpur, George Town).
What is 9:00 AM GMT in SGT?
9:00 AM in GMT corresponds to 5:00 PM in SGT. You can cross-reference every hour of the day in the 24-hour visual schedule table above.
Which time zone is ahead, GMT or SGT?
SGT is ahead by 8 hours.