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KST
12am
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KST
UTC+8:30
30m behind
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KST at UTC+8:30 is not used on this date
This converter keeps KST at UTC+8:30. Pyongyang uses KST (UTC+9) on this date. Choose Pyongyang, Hamhung, or Nampo for city-specific time.

Quick answers

Selected conversion

9:00 pm21:00 KST (UTC+9), Oct 24, 2026 = 8:30 pm20:30 KST (UTC+8:30), Oct 24, 2026

KST is 30 minutes ahead of KST.

KST and KST examples

These examples always use KST (UTC+9) and KST (UTC+8:30). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

KST is 30 minutes ahead of KST.

How the time difference changes

KST is 30 minutes ahead of KST Pyongyang year-round.

Working hours of 9:00 am to 6:00 pm in KST correspond to 8:30 am to 5:30 pm in KST Pyongyang.Working hours of 09:00 to 18:00 in KST correspond to 08:30 to 17:30 in KST Pyongyang.

Compare KST time with KST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Korea Standard Time is 30 minutes ahead of Pyongyang Time.
9:00 pm21:00 in KST is 8:30 pm20:30 in KST

KST to KST call time
Best time for a conference call or a meeting is between 9:30am-6pm09:30-18:00 in KST which corresponds to 9am-5:30pm09:00-17:30 in KST

9:00 pm21:00 Korea Standard Time (KST). Offset UTC +9:00 hours
8:30 pm20:30 Pyongyang Time (KST). Offset UTC +8:30 hours

9:00 pm21:00 KST / 8:30 pm20:30 KST

Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.

Hourly time comparison
KSTKST
11:30pm previous day
12:30am
1:30am
2:30am
3:30am
4:30am
5:30am
6:30am
7:30am
8:30am
9:30am
10:30am
11:30am
12:30pm
1:30pm
2:30pm
3:30pm
4:30pm
5:30pm
6:30pm
7:30pm
8:30pm
9:30pm
10:30pm
23:30 previous day
00:30
01:30
02:30
03:30
04:30
05:30
06:30
07:30
08:30
09:30
10:30
11:30
12:30
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17:30
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21:30
22:30

Korea Standard Time

Offset: KST is 9 hours ahead of Greenwich Mean Time (GMT).

Countries using this time zone: North Korea, South Korea

Principal Cities: The largest city in the KST time zone is Seoul in South Korea, with about 10.349 million people. Other major cities in this time zone include Busan, Pyongyang, Incheon, Daegu.

Daylight Saving: Clocks in Korea Standard Time (KST) do not change for daylight saving time, so KST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

KST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +09 - basic short
  • +0900 - basic
  • +09:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0900 - sign character (+) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates an offset of nine hours to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • India - Military abbreviation for KST
  • I - short form of 'India'
IANA/Olson: Reflects KST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Pyongyang
  • Asia/Seoul
  • ROK
KST Abbreviation: Several time zones share KST abbreviation and it could refer to these time zones
  • Korea Standard Time - UTC +9
  • Pyongyang Time - UTC +8:30
Time zones with the GMT +9 offset:
  • AWDT - Australian Western Daylight Time
  • CHOST - Choibalsan Summer Time
  • I - India Time Zone
  • IRKST - Irkutsk Summer Time
  • JST - Japan Standard Time
  • KST - Korea Standard Time
  • PWT - Palau Time
  • TLT - East Timor Time
  • ULAST - Ulaanbaatar Summer Time
  • WIT - Eastern Indonesian Time
  • YAKT - Yakutsk Time

Pyongyang Time

Offset: KST is 8 hours and 30 minutes ahead of Greenwich Mean Time (GMT).

KST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +0830 - basic
  • +08:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0830 - sign character (+) followed by a four digit time providing hours (08) and minutes (30) of the offset. Indicates an offset of eight hours and thirty minutes to the east of the zero meridian.
KST Abbreviation: Several time zones share KST abbreviation and it could refer to these time zones
  • Korea Standard Time - UTC +9
  • Pyongyang Time - UTC +8:30