Seoul, South Korea Hanoi, Vietnam

Seoul is in the KST timezone (UTC+9) and Hanoi is in the +07 timezone (UTC+7). The time difference between them is 2 hours.

Use the timeline above to find overlapping business hours between Seoul and Hanoi. The "Best time to meet" card highlights the window where both cities are within working hours (9 AM – 6 PM local time).

Neither Seoul nor Hanoi observes Daylight Saving Time, so the time difference remains constant throughout the year.

Click the pencil icon next to the Seoul clock and type any time. The Hanoi clock will update instantly, showing the exact corresponding time. You can also pick a date to account for DST changes.