From
Seoul
South Korea
6:45 PM
Sun, Nov 1
UTC+9Asia/Seoul
Time Difference
Seoul vs Hanoi Time Difference
Compare the current local time in Seoul, South Korea and Hanoi, Vietnam.
Live local timeDST awareUTC offsets
Current difference
Hanoi is currently 1 hour 60 minutes behind Seoul.
This difference is calculated using the current UTC offsets for both locations and automatically reflects daylight-saving changes.
24-hour comparison
Compare Seoul and Hanoi hour by hour
See how a full local day in Seoul, South Korea maps to Hanoi, Vietnam. TimeInOne automatically accounts for timezone offsets, date changes and daylight-saving transitions.
Best working-hours overlap
11:00 AM – 6:00 PM in Seoul
corresponds to 9:00 AM – 4:00 PM in Hanoi.
Seoul
Asia/Seoul
Hanoi
Asia/Bangkok
Availability
12:00 AM
Sun, Nov 1
10:00 PM
Previous daySat, Oct 31
Night
1:00 AM
Sun, Nov 1
11:00 PM
Previous daySat, Oct 31
Night
2:00 AM
Sun, Nov 1
12:00 AM
Sun, Nov 1
Night
3:00 AM
Sun, Nov 1
1:00 AM
Sun, Nov 1
Night
4:00 AM
Sun, Nov 1
2:00 AM
Sun, Nov 1
Night
5:00 AM
Sun, Nov 1
3:00 AM
Sun, Nov 1
Night
6:00 AM
Sun, Nov 1
4:00 AM
Sun, Nov 1
Night
7:00 AM
Sun, Nov 1
5:00 AM
Sun, Nov 1
Night
8:00 AM
Sun, Nov 1
6:00 AM
Sun, Nov 1
Night
9:00 AM
Sun, Nov 1
7:00 AM
Sun, Nov 1
Possible
10:00 AM
Sun, Nov 1
8:00 AM
Sun, Nov 1
Possible
11:00 AM
Sun, Nov 1
9:00 AM
Sun, Nov 1
Good overlap
12:00 PM
Sun, Nov 1
10:00 AM
Sun, Nov 1
Good overlap
1:00 PM
Sun, Nov 1
11:00 AM
Sun, Nov 1
Good overlap
2:00 PM
Sun, Nov 1
12:00 PM
Sun, Nov 1
Good overlap
3:00 PM
Sun, Nov 1
1:00 PM
Sun, Nov 1
Good overlap
4:00 PM
Sun, Nov 1
2:00 PM
Sun, Nov 1
Good overlap
5:00 PM
Sun, Nov 1
3:00 PM
Sun, Nov 1
Good overlap
6:00 PM
Sun, Nov 1
4:00 PM
Sun, Nov 1
Possible
7:00 PM
Sun, Nov 1
5:00 PM
Sun, Nov 1
Possible
8:00 PM
Sun, Nov 1
6:00 PM
Sun, Nov 1
Possible
9:00 PM
Sun, Nov 1
7:00 PM
Sun, Nov 1
Night
10:00 PM
Sun, Nov 1
8:00 PM
Sun, Nov 1
Night
11:00 PM
Sun, Nov 1
9:00 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 Seoul
Compare typical business hours in Seoul, South Korea and Hanoi, Vietnam to find a practical time for calls, meetings or international coordination.
No direct business-hours overlap
Flexible scheduling is recommended
Typical 9:00 AM–6:00 PM working hours do not overlap directly between Seouland Hanoi. Consider an early-morning or evening call instead.
Other reasonable windows
Seoul
6:45 PM – 9:45 PM
Hanoi
4:45 PM – 7:45 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
Seoul and Hanoi time difference explained
Current local-time relationship
Hanoi is currently 2 hours behind Seoul.
Seoul uses Asia/Seoul and currently has an offset of UTC+9. 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 11:00 AM to 6:00 PM in Seoul, corresponding to 9:00 AM–4:00 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 Seoul and Hanoi.
Open time converterLocal clocks
Explore each city
FAQ
Seoul to Hanoi time difference FAQ
Common questions about the current time difference, UTC offsets, daylight-saving changes and practical calling hours between Seoul and Hanoi.
What is the time difference between Seoul and Hanoi?
The current time difference between Seoul and Hanoi is 2 hours. Hanoi is currently 2 hours behind Seoul.
Is Hanoi ahead of or behind Seoul?
Hanoi is currently 2 hours behind Seoul.
What time is it in Hanoi when it is 9:00 AM in Seoul?
Using the current UTC offsets, 9:00 AM in Seoul corresponds to 7:00 AM in Hanoi. The exact difference can change when daylight-saving rules change.
What is the best time to call Hanoi from Seoul?
Typical 9:00 AM–6:00 PM business hours overlap between 11:00 AM and 6:00 PM in Seoul. This corresponds to 9:00 AM–4:00 PM in Hanoi.
Can the time difference between Seoul and Hanoi change?
Yes. The time difference can change if Seoul or Hanoi changes its UTC offset because of daylight-saving or other local time-zone rules. TimeInOne uses the IANA zones Asia/Seoul and Asia/Bangkok for date-aware calculations.