The best time to call Singapore from Oklahoma City is 9 AM–11 AM your time (Oklahoma City). Singapore, Singapore is 11 hours behind Oklahoma City, USA. There is no standard business hours overlap, so one party will need to adjust their schedule.
Call between 9 AM–11 AM Oklahoma City time.
Oklahoma City and Singapore have no overlapping standard business hours. One party will need to adjust.
The best time to call Singapore from Oklahoma City is 9 AM–11 AM Oklahoma City time. There is no standard business hours overlap between these cities.
Singapore is 11 hours behind Oklahoma City.
Avoid calling after 9 AM your time (it's late night there). Consider email or async communication for non-urgent matters.
No, Oklahoma City and Singapore do not have overlapping standard business hours (9 AM – 5 PM). You will need to schedule calls outside normal hours for one party.
No business hours overlap. You'll need to call outside standard hours — 9 AM–11 AM your time is the least disruptive window.
Both in business hours Both awake One outside comfort zone Sleeping hours
No standard business hours overlap (9 AM – 5 PM) between Oklahoma City and Singapore.
One party will need to adjust their schedule for calls.
| Oklahoma City (CDT) | Singapore (GMT+8) | Status |
|---|---|---|
| 7 AM | 8 PM | 🟡 They're awake |
| 8 AM | 9 PM | 🟡 They're awake |
| 9 AM | 10 PM | 🔴 They're sleeping |
| 10 AM | 11 PM | 🔴 They're sleeping |
| 11 AM | 12 AM | 🔴 They're sleeping |
| 12 PM | 1 AM | 🔴 They're sleeping |
| 1 PM | 2 AM | 🔴 They're sleeping |
| 2 PM | 3 AM | 🔴 They're sleeping |
| 3 PM | 4 AM | 🔴 They're sleeping |
| 4 PM | 5 AM | 🔴 They're sleeping |
| 5 PM | 6 AM | 🔴 They're sleeping |
| 6 PM | 7 AM | 🟡 They're awake |
| 7 PM | 8 AM | 🟡 They're awake |
| 8 PM | 9 AM | 🟡 They're awake |
| 9 PM | 10 AM | 🟡 They're awake |