World Timezones

Seoul to Hanoi Converter

Compare Hanoi to Seoul instead
Seoul11:22 amMon, Jun 8
SeoulKST
South Korea · UTC+9
11:22 amMon, Jun 8
12a
1a
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4a
5a
6a
7a
8a
9a
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12p
1p
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8p
9p
10p
11p
HanoiICT
Vietnam · UTC+7
9:22 amMon, Jun 8
10p
11p
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
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8p
9p

Offset

The time difference between Seoul and Hanoi is 2 hours.

2 hours

Seoul (KST) is ahead of Hanoi (ICT).

KST: UTC+9

ICT: UTC+7

Neither Seoul nor Hanoi is currently observing daylight saving time.

When to schedule

Business-hours overlap: 11 AM–5 PM in Seoul (9 AM–3 PM in Hanoi).

Both teams are in working hours during this window on weekdays.

Suggested time: 2:00 PM Seoul (12:00 PM Hanoi).

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

South Korea

  • New Year's DayThu, Jan 1
  • Lunar New YearMon, Feb 16
  • Lunar New YearTue, Feb 17
  • Lunar New YearWed, Feb 18
  • Independence Movement DayMon, Mar 2
  • Labour DayFri, May 1
  • Children's DayTue, May 5
  • Buddha's BirthdayMon, May 25
  • Local Election DayWed, Jun 3
  • Memorial DaySat, Jun 6
  • Constitution DayFri, Jul 17
  • Liberation DayMon, Aug 17
  • ChuseokThu, Sep 24
  • ChuseokFri, Sep 25
  • ChuseokSat, Sep 26
  • National Foundation DayMon, Oct 5
  • Hangul DayFri, Oct 9
  • Christmas DayFri, Dec 25

Vietnam

  • New Year's DayThu, Jan 1
  • Reunification DayThu, Apr 30
  • Labour DayFri, May 1
  • National DayWed, Sep 2

About these zones

Seoul uses Korea Standard Time (KST). To call South Korea, dial +82.

Hanoi uses Indochina Time (ICT). To call Vietnam, dial +84.

Hanoi is approximately 1,700 miles southwest of Seoul.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

SeoulHanoiDay
12:00 am10:00 pm-1 day
1:00 am11:00 pm-1 day
2:00 am12:00 amSame day
3:00 am1:00 amSame day
4:00 am2:00 amSame day
5:00 am3:00 amSame day
6:00 am4:00 amSame day
7:00 am5:00 amSame day
8:00 am6:00 amSame day
9:00 am7:00 amSame day
10:00 am8:00 amSame day
11:00 am9:00 amSame day
12:00 pm10:00 amSame day
1:00 pm11:00 amSame day
2:00 pm12:00 pmSame day
3:00 pm1:00 pmSame day
4:00 pm2:00 pmSame day
5:00 pm3:00 pmSame day
6:00 pm4:00 pmSame day
7:00 pm5:00 pmSame day
8:00 pm6:00 pmSame day
9:00 pm7:00 pmSame day
10:00 pm8:00 pmSame day
11:00 pm9:00 pmSame day

Daylight saving time

Neither Seoul nor Hanoi observes daylight saving time. The offset between these zones remains constant year-round.

See the daylight saving time page for transition dates across every time zone.

Daylight today

Seoul
Sunrise
5:12 AM
Sunset
7:52 PM
Day length
14h 41m
Hanoi
Sunrise
5:15 AM
Sunset
6:38 PM
Day length
13h 22m

Daylight overlap: 12h 37m — 7:15 AM–7:52 PM in Seoul (5:15 AM–5:52 PM in Hanoi). Both locations are in daylight during this window.

Cities in these zones

Other cities in Korea Standard Time

Other cities in Indochina Time

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in Korea Standard Time

  • GMP
  • ICN
  • PUS
  • TAE
  • CJJ
  • KWJ
  • MWX

Airports in Indochina Time

  • HAN
  • BKK
  • DMK
  • HPH

Related conversions

Common conversions

What is 9:00 am Seoul in Hanoi?
9:00 am Seoul is 7:00 am Hanoi.
What is 12:00 pm Seoul in Hanoi?
12:00 pm Seoul is 10:00 am Hanoi.
What is 12:30 pm Seoul in Hanoi?
12:30 pm Seoul is 10:30 am Hanoi.
What is 2:00 pm Seoul in Hanoi?
2:00 pm Seoul is 12:00 pm Hanoi.
What is 5:00 pm Seoul in Hanoi?
5:00 pm Seoul is 3:00 pm Hanoi.
What is 11:30 pm Seoul in Hanoi?
11:30 pm Seoul is 9:30 pm Hanoi.