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KST to LHST Converter

Updating current time…
KST
Korea Standard Time
GMT +9
12am
3am
6am
9am
12pm
3pm
6pm
9pm
LHST
Lord Howe Standard Time
GMT +10:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

The selected date and time will appear here when the converter loads.

KST and LHST examples

These examples always use KST (UTC+9) and LHST (UTC+10:30). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

KST is 1 hour and 30 minutes behind LHST.

How the time difference changes

Depending on seasonal clock changes, KST is 1 hour and 30 minutes behind LHST or KST is 2 hours behind LHDT.

Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in KST correspond to 10:30 am to 6:30 pm in LHST or working hours of 9:00 am to 5:00 pm in KST correspond to 11:00 am to 7:00 pm in LHDT.

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

Time Difference

Korea Standard Time is 1 hour and 30 minutes behind Lord Howe Standard Time
8:00 am08:00 in KST is 9:30 am09:30 in LHST

KST to LHST call time
Best time for a conference call or a meeting is between 9am-3:30pm in KST which corresponds to 10:30am-5pm in LHST

8:00 am08:00 Korea Standard Time (KST). Offset UTC +9:00 hours
9:30 am09:30 Lord Howe Standard Time (LHST). Offset UTC +10:30 hours

8:00 am08:00 KST / 9:30 am09:30 LHST

KSTLHST
12am (midnight)1:30 am
1am2:30 am
2am3:30 am
3am4:30 am
4am5:30 am
5am6:30 am
6am7:30 am
7am8:30 am
8am9:30 am
9am10:30 am
10am11:30 am
11am12:30 pm
12pm (noon)1:30 pm
1pm2:30 pm
2pm3:30 pm
3pm4:30 pm
4pm5:30 pm
5pm6:30 pm
6pm7:30 pm
7pm8:30 pm
8pm9:30 pm
9pm10:30 pm
10pm11:30 pm
11pm12:30 am
00:0001:30
01:0002:30
02:0003:30
03:0004:30
04:0005:30
05:0006:30
06:0007:30
07:0008:30
08:0009:30
09:0010:30
10:0011:30
11:0012:30
12:0013:30
13:0014:30
14:0015:30
15:0016:30
16:0017:30
17:0018:30
18:0019:30
19:0020:30
20:0021:30
21:0022:30
22:0023:30
23:0000:30

Korea Standard Time

Offset: KST is 9 hours ahead Greenwich Mean Time (GMT) and is used in Asia

Countries using this time zone: Korea (North), Korea (South)

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.

KST Time Zone Geo Map
KST timezone map

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

Lord Howe Standard Time

Offset: LHST is 10 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Australia

Countries using this time zone: Australia

LHST Time Zone Geo Map
LHST timezone map

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Lord Howe Daylight Time (LHDT).

Start: Lord Howe Standard Time (LHST) started on Sunday, April 5, 2026 at 2:00 am local time and clocks were set one hour back to Sunday, April 5, 2026, 1:30 am. Standard time starts annually on the first Sunday of April.

End: Lord Howe Standard Time (LHST) ends on Sunday, October 4, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, October 4, 2026, 2:30 am local daylight time instead. Standard time ends annually on the first Sunday of October.

LHST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +1030 - basic
  • +10:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1030 - sign character (+) followed by a four digit time providing hours (10) and minutes (30) of the offset. Indicates an offset of ten hours and thirty minutes to the east of the zero meridian.
Time zones with the GMT +10:30 offset:
  • ACDT - Australian Central Daylight Time
  • LHST - Lord Howe Standard Time
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT