Colombo, Sri Lanka
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Asia/ColomboGMT+05:30
Hanoi, Vietnam
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Asia/BangkokGMT+07:00
1.5h
Time Difference
7h
Business Hours Overlap
Yes
Good Call Window
Best Times to Call
These times work well for both cities during business hours (9 AM - 5 PM):
9:00 AM in Colombo
10:30 AM in Hanoi
10:00 AM in Colombo
11:30 AM in Hanoi
11:00 AM in Colombo
12:30 PM in Hanoi
12:00 PM in Colombo
1:30 PM in Hanoi
Hour-by-Hour Time Conversion
| Colombo | Hanoi | Status |
|---|---|---|
| 12:00 AM | 1:30 AM | |
| 1:00 AM | 2:30 AM | |
| 2:00 AM | 3:30 AM | |
| 3:00 AM | 4:30 AM | |
| 4:00 AM | 5:30 AM | |
| 5:00 AM | 6:30 AM | |
| 6:00 AM | 7:30 AM | |
| 7:00 AM | 8:30 AM | |
| 8:00 AM | 9:30 AM | Work in Hanoi |
| 9:00 AM | 10:30 AM | Work Hours |
| 10:00 AM | 11:30 AM | Work Hours |
| 11:00 AM | 12:30 PM | Work Hours |
| 12:00 PM | 1:30 PM | Work Hours |
| 1:00 PM | 2:30 PM | Work Hours |
| 2:00 PM | 3:30 PM | Work Hours |
| 3:00 PM | 4:30 PM | Work Hours |
| 4:00 PM | 5:30 PM | Work in Colombo |
| 5:00 PM | 6:30 PM | |
| 6:00 PM | 7:30 PM | |
| 7:00 PM | 8:30 PM | |
| 8:00 PM | 9:30 PM | |
| 9:00 PM | 10:30 PM | |
| 10:00 PM | 11:30 PM | |
| 11:00 PM | 12:30 AM |
More Time Comparisons
About the Time Difference Between Colombo and Hanoi
The time difference between Colombo, Sri Lanka and Hanoi, Vietnam is 1.5 hours ahead.Colombo operates on the Asia/Colombo timezone (GMT+05:30), while Hanoi uses Asia/Bangkok (GMT+07:00).
Scheduling Tips
- Business hours overlap: There are 7 hours when both cities are within typical work hours (9 AM - 5 PM).
- Best call times: Schedule calls during the green-highlighted hours in the conversion table above for optimal timing.
- Daylight Saving Time: Remember that the time difference may change during DST transitions. Always verify current times before important meetings.
Frequently Asked Questions
When it's noon in Colombo, what time is it in Hanoi?
When it's 12:00 PM (noon) in Colombo, it's 2:00 PM in Hanoi.