From
Haikou
China
10:40 AM
Sun, Nov 1
UTC+8Asia/Shanghai
Time Difference
Haikou vs Hanoi Time Difference
Compare the current local time in Haikou, China and Hanoi, Vietnam.
Live local timeDST awareUTC offsets
Current difference
Hanoi is currently 1 hour behind Haikou.
This difference is calculated using the current UTC offsets for both locations and automatically reflects daylight-saving changes.
24-hour comparison
Compare Haikou and Hanoi hour by hour
See how a full local day in Haikou, China maps to Hanoi, Vietnam. TimeInOne automatically accounts for timezone offsets, date changes and daylight-saving transitions.
Best working-hours overlap
10:00 AM – 6:00 PM in Haikou
corresponds to 9:00 AM – 5:00 PM in Hanoi.
Haikou
Asia/Shanghai
Hanoi
Asia/Bangkok
Availability
12:00 AM
Sun, Nov 1
11:00 PM
Previous daySat, Oct 31
Night
1:00 AM
Sun, Nov 1
12:00 AM
Sun, Nov 1
Night
2:00 AM
Sun, Nov 1
1:00 AM
Sun, Nov 1
Night
3:00 AM
Sun, Nov 1
2:00 AM
Sun, Nov 1
Night
4:00 AM
Sun, Nov 1
3:00 AM
Sun, Nov 1
Night
5:00 AM
Sun, Nov 1
4:00 AM
Sun, Nov 1
Night
6:00 AM
Sun, Nov 1
5:00 AM
Sun, Nov 1
Night
7:00 AM
Sun, Nov 1
6:00 AM
Sun, Nov 1
Night
8:00 AM
Sun, Nov 1
7:00 AM
Sun, Nov 1
Possible
9:00 AM
Sun, Nov 1
8:00 AM
Sun, Nov 1
Possible
10:00 AM
Sun, Nov 1
9:00 AM
Sun, Nov 1
Good overlap
11:00 AM
Sun, Nov 1
10:00 AM
Sun, Nov 1
Good overlap
12:00 PM
Sun, Nov 1
11:00 AM
Sun, Nov 1
Good overlap
1:00 PM
Sun, Nov 1
12:00 PM
Sun, Nov 1
Good overlap
2:00 PM
Sun, Nov 1
1:00 PM
Sun, Nov 1
Good overlap
3:00 PM
Sun, Nov 1
2:00 PM
Sun, Nov 1
Good overlap
4:00 PM
Sun, Nov 1
3:00 PM
Sun, Nov 1
Good overlap
5:00 PM
Sun, Nov 1
4:00 PM
Sun, Nov 1
Good overlap
6:00 PM
Sun, Nov 1
5:00 PM
Sun, Nov 1
Possible
7:00 PM
Sun, Nov 1
6:00 PM
Sun, Nov 1
Possible
8:00 PM
Sun, Nov 1
7:00 PM
Sun, Nov 1
Possible
9:00 PM
Sun, Nov 1
8:00 PM
Sun, Nov 1
Night
10:00 PM
Sun, Nov 1
9:00 PM
Sun, Nov 1
Night
11:00 PM
Sun, Nov 1
10:00 PM
Sun, Nov 1
Night
Working-hour labels use a general 9:00 AM–6:00 PM schedule. Individual schedules may differ.
On daylight-saving transition dates, a local day can contain 23 or 25 real hours instead of 24.
Call planning
Best time to call Hanoi from Haikou
Compare typical business hours in Haikou, China and Hanoi, Vietnam to find a practical time for calls, meetings or international coordination.
Haikou
10:40 AM – 6:40 PM
China
Best overlap
Hanoi
9:40 AM – 5:40 PM
Vietnam
The best time to call Hanoi from Haikou is between 10:40 AM and 6:40 PM in Haikou. This corresponds to 9:40 AM – 5:40 PM in Hanoi.
Other reasonable windows
Haikou
6:40 PM – 9:40 PM
Hanoi
5:40 PM – 8:40 PM
Recommendations use typical 9:00 AM–6:00 PM business hours and a broader 7:00 AM–9:00 PM acceptable calling window. Individual schedules may differ.
Time difference explained
Haikou and Hanoi time difference explained
Current local-time relationship
Hanoi is currently 1 hour behind Haikou.
Haikou uses Asia/Shanghai and currently has an offset of UTC+8. Hanoi uses Asia/Bangkok and currently has an offset of UTC+7.
Working-hours overlap
For a typical 9:00 AM–6:00 PM workday, the cities overlap from 10:00 AM to 6:00 PM in Haikou, corresponding to 9:00 AM–5:00 PM in Hanoi.
Because UTC offsets can change during the year, always check the selected date when planning an important international call or meeting.
Convert a specific time
Need more than the current difference?
Convert a specific date and local time between Haikou and Hanoi.
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FAQ
Haikou to Hanoi time difference FAQ
Common questions about the current time difference, UTC offsets, daylight-saving changes and practical calling hours between Haikou and Hanoi.
What is the time difference between Haikou and Hanoi?
The current time difference between Haikou and Hanoi is 1 hour. Hanoi is currently 1 hour behind Haikou.
Is Hanoi ahead of or behind Haikou?
Hanoi is currently 1 hour behind Haikou.
What time is it in Hanoi when it is 9:00 AM in Haikou?
Using the current UTC offsets, 9:00 AM in Haikou corresponds to 8:00 AM in Hanoi. The exact difference can change when daylight-saving rules change.
What is the best time to call Hanoi from Haikou?
Typical 9:00 AM–6:00 PM business hours overlap between 10:00 AM and 6:00 PM in Haikou. This corresponds to 9:00 AM–5:00 PM in Hanoi.
Can the time difference between Haikou and Hanoi change?
Yes. The time difference can change if Haikou or Hanoi changes its UTC offset because of daylight-saving or other local time-zone rules. TimeInOne uses the IANA zones Asia/Shanghai and Asia/Bangkok for date-aware calculations.