KST to BST Pacific Converter
Start by searching for a time zone, city, or town.
Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
9:00 pm21:00 KST (UTC+9), Nov 5, 2026 = 11:00 pm23:00 BST (UTC+11), Nov 5, 2026
KST is 2 hours behind BST.
KST and BST examples
These examples always use KST (UTC+9) and BST (UTC+11). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
KST is 2 hours behind BST.
How the time difference changes
KST is 2 hours behind BST Pacific year-round.
Working hours of 9:00 am to 6:00 pm in KST correspond to 11:00 am to 8:00 pm in BST Pacific.Working hours of 09:00 to 18:00 in KST correspond to 11:00 to 20:00 in BST Pacific.
Compare KST time with BST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Korea Standard Time is 2 hours behind Bougainville Standard Time.
9:00 pm21:00 in KST is 11:00 pm23:00 in BST
KST to BST call time
Best time for a conference call or a meeting is between 9am-4pm09:00-16:00 in KST which corresponds to 11am-6pm11:00-18:00 in BST
9:00 pm21:00 Korea Standard Time (KST). Offset UTC +9:00 hours
11:00 pm23:00 Bougainville Standard Time (BST). Offset UTC +11:00 hours
9:00 pm21:00 KST / 11:00 pm23:00 BST
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.
| KST | BST |
|---|---|
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| 5:00pm | |
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| 11:00pm | |
| 12:00am next day | |
| 1:00am next day | |
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| 11:00 | |
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| 00:00 next day | |
| 01:00 next day |
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
- +09 - basic short
- +0900 - basic
- +09:00 - extended
- +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.
- India - Military abbreviation for KST
- I - short form of 'India'
- Asia/Pyongyang
- Asia/Seoul
- ROK
- Korea Standard Time - UTC +9
- Pyongyang Time - UTC +8:30
- 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
Bougainville Standard Time
Offset: BST is 11 hours ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Papua New Guinea
Principal Cities: The largest city in the BST time zone is Arawa in Papua New Guinea, with about 40,266 people. Other major cities in this time zone include Kieta, Panguna.
Daylight Saving: Clocks in Bougainville Standard Time (BST) do not change for daylight saving time, so BST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
BST representations, usage and related time zones
- +11 - basic short
- +1100 - basic
- +11:00 - extended
- +1100 - sign character (+) followed by a four digit time providing hours (11) and minutes (00) of the offset. Indicates an offset of eleven hours to the east of the zero meridian.
- Lima - Military abbreviation for BST
- L - short form of 'Lima'
- British Summer Time - UTC +1
- Bangladesh Standard Time - UTC +6
- Bougainville Standard Time - UTC +11
- AEDT - Australian Eastern Daylight Time
- BST - Bougainville Standard Time
- KOST - Kosrae Time
- L - Lima Time Zone
- LHDT - Lord Howe Daylight Time
- MAGT - Magadan Time
- NCT - New Caledonia Time
- NFT - Norfolk Time
- PONT - Pohnpei Standard Time
- SBT - Solomon Islands Time
- VLAST - Vladivostok Summer Time
- VUT - Vanuatu Time