BST Pacific to ChST Converter
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Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
11:00 pm23:00 BST (UTC+11), Oct 25, 2026 = 10:00 pm22:00 ChST (UTC+10), Oct 25, 2026
BST is 1 hour ahead of ChST.
BST and ChST examples
These examples always use BST (UTC+11) and ChST (UTC+10). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
BST is 1 hour ahead of ChST.
How the time difference changes
BST Pacific is 1 hour ahead of ChST year-round.
Working hours of 9:00 am to 6:00 pm in BST Pacific correspond to 8:00 am to 5:00 pm in ChST.Working hours of 09:00 to 18:00 in BST Pacific correspond to 08:00 to 17:00 in ChST.
Compare BST time with ChST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Bougainville Standard Time is 1 hour ahead of Chamorro Standard Time.
11:00 pm23:00 in BST is 10:00 pm22:00 in ChST
BST to ChST call time
Best time for a conference call or a meeting is between 10am-6pm10:00-18:00 in BST which corresponds to 9am-5pm09:00-17:00 in ChST
11:00 pm23:00 Bougainville Standard Time (BST). Offset UTC +11:00 hours
10:00 pm22:00 Chamorro Standard Time (ChST). Offset UTC +10:00 hours
11:00 pm23:00 BST / 10:00 pm22:00 ChST
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.
| BST | ChST |
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| 11:00pm previous day | |
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| 23:00 previous day | |
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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
Chamorro Standard Time
Offset: ChST is 10 hours ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Guam, Northern Mariana Islands
Principal Cities: The largest city in the ChST time zone is Saipan in the Northern Mariana Islands, with about 48,220 people. Other major cities in this time zone include Dededo Village, Yigo Village, Tamuning-Tumon-Harmon Village, Mangilao Village.
Daylight Saving: Clocks in Chamorro Standard Time (ChST) do not change for daylight saving time, so ChST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
ChST representations, usage and related time zones
- +10 - basic short
- +1000 - basic
- +10:00 - extended
- +1000 - sign character (+) followed by a four digit time providing hours (10) and minutes (00) of the offset. Indicates an offset of ten hours to the east of the zero meridian.
- Kilo - Military abbreviation for ChST
- K - short form of 'Kilo'
- Pacific/Guam
- Pacific/Saipan
- AEST - Australian Eastern Standard Time
- CHUT - Chuuk Time
- ChST - Chamorro Standard Time
- K - Kilo Time Zone
- KDT - Korea Daylight Time
- PGT - Papua New Guinea Time
- VLAT - Vladivostok Time
- YAKST - Yakutsk Summer Time
- YAPT - Yap Time