World Timezones

AST to KST Converter

Compare KST to AST instead
Arabia Standard Time7:36 amFri, Jun 5
Arabia Standard TimeAST
Middle East · UTC+3
7:36 amFri, Jun 5
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
Korea Standard TimeKST
Asia · UTC+9
1:36 pmFri, Jun 5
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
12a
1a
2a
3a
4a
5a

Offset

The time difference between Arabia Standard Time and Korea Standard Time is 6 hours.

6 hours

Arabia Standard Time (AST) is behind Korea Standard Time (KST).

AST: UTC+3

KST: UTC+9

Neither Arabia Standard Time nor Korea Standard Time is currently observing daylight saving time.

When to schedule

Business-hours overlap: 9 AM–11 AM in Arabia Standard Time (3 PM–5 PM in Korea Standard Time).

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

Suggested time: 10:00 AM Arabia Standard Time (4:00 PM Korea Standard Time).

Note: the working week in Saudi Arabia runs Sunday–Thursday; Friday–Saturday is the weekend, so overlap on those days is limited.

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

About these zones

Arabia Standard Time is also known as AST. To call Saudi Arabia, dial +966.

Korea Standard Time is also known as KST. To call South Korea, dial +82.

Korea Standard Time is approximately 4,700 miles northeast of Arabia Standard Time.

Quick reference

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

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

Daylight saving time

Neither Arabia Standard Time nor Korea Standard Time 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

Arabia Standard Time
Sunrise
5:05 AM
Sunset
6:41 PM
Day length
13h 36m
Korea Standard Time
Sunrise
5:12 AM
Sunset
7:51 PM
Day length
14h 38m

Daylight overlap: 8h 46m — 5:05 AM–1:51 PM in Arabia Standard Time (11:05 AM–7:51 PM in Korea Standard Time). Both locations are in daylight during this window.

Cities in these zones

Cities in Arabia Standard Time

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in Arabia Standard Time

  • JED
  • RUH
  • MED
  • DMM

Airports in Korea Standard Time

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

Related conversions

Common conversions

What is 9:00 am AST in KST?
9:00 am AST is 3:00 pm KST.
What is 12:00 pm AST in KST?
12:00 pm AST is 6:00 pm KST.
What is 12:30 pm AST in KST?
12:30 pm AST is 6:30 pm KST.
What is 2:00 pm AST in KST?
2:00 pm AST is 8:00 pm KST.
What is 5:00 pm AST in KST?
5:00 pm AST is 11:00 pm KST.
What is 11:30 pm AST in KST?
11:30 pm AST is 5:30 am KST, the next day.