London to CST to Auckland to ACDT to Tokyo to SGT Time Converter
Central Time is on daylight saving time: CDT (UTC−5) until Sun, Nov 1.
Mexico City and Saskatchewan stay on CST (UTC−6).
Quick answers
Selected conversion
4:00 pm16:00 BST (UTC+1), Oct 12, 2026 = 10:00 am10:00 CDT (UTC-5), Oct 12, 2026 = 4:00 am04:00 NZDT (UTC+13), Oct 13, 2026 = 1:30 am01:30 ACDT (UTC+10:30), Oct 13, 2026 = 12:00 am00:00 JST (UTC+9), Oct 13, 2026 = 11:00 pm23:00 SGT (UTC+8), Oct 12, 2026
London is 6 hours ahead of CDT. London is 12 hours behind Auckland. London is 9 hours and 30 minutes behind ACDT. London is 8 hours behind Tokyo. London is 7 hours behind SGT.
How the time difference changes
London to CST
For most of the year, London is 6 hours ahead of CDT. At other times of the year, London is 6 hours ahead of CST or London is 5 hours ahead of CDT.
For most of the year, working hours of 9:00 am to 5:00 pm in London correspond to 3:00 am to 11:00 am in CDT. At other times of the year, working hours of 9:00 am to 5:00 pm in London correspond to 3:00 am to 11:00 am in CST or working hours of 9:00 am to 5:00 pm in London correspond to 4:00 am to 12:00 pm in CDT.For most of the year, working hours of 09:00 to 17:00 in London correspond to 03:00 to 11:00 in CDT. At other times of the year, working hours of 09:00 to 17:00 in London correspond to 03:00 to 11:00 in CST or working hours of 09:00 to 17:00 in London correspond to 04:00 to 12:00 in CDT.
London to Auckland
Depending on seasonal clock changes, London is 11 hours behind Auckland, London is 12 hours behind Auckland, or London is 13 hours behind Auckland.
Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in London correspond to 8:00 pm to 4:00 am (next day) in Auckland, working hours of 9:00 am to 5:00 pm in London correspond to 9:00 pm to 5:00 am (next day) in Auckland, or working hours of 9:00 am to 5:00 pm in London correspond to 10:00 pm to 6:00 am (next day) in Auckland.Depending on seasonal clock changes, working hours of 09:00 to 17:00 in London correspond to 20:00 to 04:00 (next day) in Auckland, working hours of 09:00 to 17:00 in London correspond to 21:00 to 05:00 (next day) in Auckland, or working hours of 09:00 to 17:00 in London correspond to 22:00 to 06:00 (next day) in Auckland.
London to ACDT
Depending on seasonal clock changes, London is 8 hours and 30 minutes behind ACST, London is 9 hours and 30 minutes behind ACDT, or London is 10 hours and 30 minutes behind ACDT.
Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in London correspond to 5:30 pm to 1:30 am (next day) in ACST, working hours of 9:00 am to 5:00 pm in London correspond to 6:30 pm to 2:30 am (next day) in ACDT, or working hours of 9:00 am to 5:00 pm in London correspond to 7:30 pm to 3:30 am (next day) in ACDT.Depending on seasonal clock changes, working hours of 09:00 to 17:00 in London correspond to 17:30 to 01:30 (next day) in ACST, working hours of 09:00 to 17:00 in London correspond to 18:30 to 02:30 (next day) in ACDT, or working hours of 09:00 to 17:00 in London correspond to 19:30 to 03:30 (next day) in ACDT.
London to Tokyo
For most of the year, London is 8 hours behind Tokyo. At other times of the year, London is 9 hours behind Tokyo.
For most of the year, working hours of 9:00 am to 5:00 pm in London correspond to 5:00 pm to 1:00 am (next day) in Tokyo. At other times of the year, working hours of 9:00 am to 5:00 pm in London correspond to 6:00 pm to 2:00 am (next day) in Tokyo.For most of the year, working hours of 09:00 to 17:00 in London correspond to 17:00 to 01:00 (next day) in Tokyo. At other times of the year, working hours of 09:00 to 17:00 in London correspond to 18:00 to 02:00 (next day) in Tokyo.
London to SGT
For most of the year, London is 7 hours behind SGT. At other times of the year, London is 8 hours behind SGT.
For most of the year, working hours of 9:00 am to 5:00 pm in London correspond to 4:00 pm to 12:00 am (next day) in SGT. At other times of the year, working hours of 9:00 am to 5:00 pm in London correspond to 5:00 pm to 1:00 am (next day) in SGT.For most of the year, working hours of 09:00 to 17:00 in London correspond to 16:00 to 00:00 (next day) in SGT. At other times of the year, working hours of 09:00 to 17:00 in London correspond to 17:00 to 01:00 (next day) in SGT.
Compare London time with CST, Auckland, ACDT, Tokyo, and SGT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
BST (British Summer Time) is 6 hours ahead of Central Daylight Time. BST (British Summer Time) is 12 hours behind NZDT (New Zealand Daylight Time). BST (British Summer Time) is 9 hours and 30 minutes behind Australian Central Daylight Time. BST (British Summer Time) is 8 hours behind JST (Japan Standard Time). BST (British Summer Time) is 7 hours behind Singapore Time.
4:00 pm16:00 in London, United Kingdom is 10:00 am10:00 in CDT and is 4:00 am04:00 in Auckland, New Zealand and is 1:30 am01:30 in ACDT and is 12:00 am00:00 in Tokyo, Japan and is 11:00 pm23:00 in SGT
London to CDT call time
Best time for a conference call or a meeting is between 3pm-5pm15:00-17:00 in London which corresponds to 9am-11am09:00-11:00 in CDT
London to Auckland call time
Best time for a conference call or a meeting is between 7am-8am07:00-08:00 in London which corresponds to 7pm-8pm19:00-20:00 in Auckland
London to ACDT call time
Best time for a conference call or a meeting is between 8am-9am08:00-09:00 in London which corresponds to 5:30pm-6:30pm17:30-18:30 in ACDT
London to Tokyo call time
Best time for a conference call or a meeting is between 8:30am-9:30am08:30-09:30 in London which corresponds to 4:30pm-5:30pm16:30-17:30 in Tokyo
London to SGT call time
Best time for a conference call or a meeting is between 9am-10am09:00-10:00 in London which corresponds to 4pm-5pm16:00-17:00 in SGT
4:00 pm16:00 BST (British Summer Time) (London, United Kingdom). Offset UTC +1:00 hour
10:00 am10:00 Central Daylight Time (CDT). Offset UTC -5:00 hours
4:00 am04:00 NZDT (New Zealand Daylight Time) (Auckland, New Zealand). Offset UTC +13:00 hours
1:30 am01:30 Australian Central Daylight Time (ACDT). Offset UTC +10:30 hours
12:00 am00:00 JST (Japan Standard Time) (Tokyo, Japan). Offset UTC +9:00 hours
11:00 pm23:00 Singapore Time (SGT). Offset UTC +8:00 hours
4:00 pm16:00 London, United Kingdom / 10:00 am10:00 CDT / 4:00 am04:00 Auckland, New Zealand / 1:30 am01:30 ACDT / 12:00 am00:00 Tokyo, Japan / 11:00 pm23:00 SGT
| London, United Kingdom | CDT | Auckland, New Zealand | ACDT | Tokyo, Japan | SGT |
|---|---|---|---|---|---|
| 12:00am | 6:00pm | 12:00pm | 9:30am | 8:00am | 7:00am |
| 1:00am | 7:00pm | 1:00pm | 10:30am | 9:00am | 8:00am |
| 2:00am | 8:00pm | 2:00pm | 11:30am | 10:00am | 9:00am |
| 3:00am | 9:00pm | 3:00pm | 12:30pm | 11:00am | 10:00am |
| 4:00am | 10:00pm | 4:00pm | 1:30pm | 12:00pm | 11:00am |
| 5:00am | 11:00pm | 5:00pm | 2:30pm | 1:00pm | 12:00pm |
| 6:00am | 12:00am | 6:00pm | 3:30pm | 2:00pm | 1:00pm |
| 7:00am | 1:00am | 7:00pm | 4:30pm | 3:00pm | 2:00pm |
| 8:00am | 2:00am | 8:00pm | 5:30pm | 4:00pm | 3:00pm |
| 9:00am | 3:00am | 9:00pm | 6:30pm | 5:00pm | 4:00pm |
| 10:00am | 4:00am | 10:00pm | 7:30pm | 6:00pm | 5:00pm |
| 11:00am | 5:00am | 11:00pm | 8:30pm | 7:00pm | 6:00pm |
| 12:00pm | 6:00am | 12:00am | 9:30pm | 8:00pm | 7:00pm |
| 1:00pm | 7:00am | 1:00am | 10:30pm | 9:00pm | 8:00pm |
| 2:00pm | 8:00am | 2:00am | 11:30pm | 10:00pm | 9:00pm |
| 3:00pm | 9:00am | 3:00am | 12:30am | 11:00pm | 10:00pm |
| 4:00pm | 10:00am | 4:00am | 1:30am | 12:00am | 11:00pm |
| 5:00pm | 11:00am | 5:00am | 2:30am | 1:00am | 12:00am |
| 6:00pm | 12:00pm | 6:00am | 3:30am | 2:00am | 1:00am |
| 7:00pm | 1:00pm | 7:00am | 4:30am | 3:00am | 2:00am |
| 8:00pm | 2:00pm | 8:00am | 5:30am | 4:00am | 3:00am |
| 9:00pm | 3:00pm | 9:00am | 6:30am | 5:00am | 4:00am |
| 10:00pm | 4:00pm | 10:00am | 7:30am | 6:00am | 5:00am |
| 11:00pm | 5:00pm | 11:00am | 8:30am | 7:00am | 6:00am |
| 00:00 | 18:00 | 12:00 | 09:30 | 08:00 | 07:00 |
| 01:00 | 19:00 | 13:00 | 10:30 | 09:00 | 08:00 |
| 02:00 | 20:00 | 14:00 | 11:30 | 10:00 | 09:00 |
| 03:00 | 21:00 | 15:00 | 12:30 | 11:00 | 10:00 |
| 04:00 | 22:00 | 16:00 | 13:30 | 12:00 | 11:00 |
| 05:00 | 23:00 | 17:00 | 14:30 | 13:00 | 12:00 |
| 06:00 | 00:00 | 18:00 | 15:30 | 14:00 | 13:00 |
| 07:00 | 01:00 | 19:00 | 16:30 | 15:00 | 14:00 |
| 08:00 | 02:00 | 20:00 | 17:30 | 16:00 | 15:00 |
| 09:00 | 03:00 | 21:00 | 18:30 | 17:00 | 16:00 |
| 10:00 | 04:00 | 22:00 | 19:30 | 18:00 | 17:00 |
| 11:00 | 05:00 | 23:00 | 20:30 | 19:00 | 18:00 |
| 12:00 | 06:00 | 00:00 | 21:30 | 20:00 | 19:00 |
| 13:00 | 07:00 | 01:00 | 22:30 | 21:00 | 20:00 |
| 14:00 | 08:00 | 02:00 | 23:30 | 22:00 | 21:00 |
| 15:00 | 09:00 | 03:00 | 00:30 | 23:00 | 22:00 |
| 16:00 | 10:00 | 04:00 | 01:30 | 00:00 | 23:00 |
| 17:00 | 11:00 | 05:00 | 02:30 | 01:00 | 00:00 |
| 18:00 | 12:00 | 06:00 | 03:30 | 02:00 | 01:00 |
| 19:00 | 13:00 | 07:00 | 04:30 | 03:00 | 02:00 |
| 20:00 | 14:00 | 08:00 | 05:30 | 04:00 | 03:00 |
| 21:00 | 15:00 | 09:00 | 06:30 | 05:00 | 04:00 |
| 22:00 | 16:00 | 10:00 | 07:30 | 06:00 | 05:00 |
| 23:00 | 17:00 | 11:00 | 08:30 | 07:00 | 06:00 |
London Information
Time Zone
GMT - Greenwich Mean Time
+0:00 hours during Greenwich Mean Time.
Sunday, March 29, 2026 at 1:00 amSunday, March 29, 2026 at 01:00 local time. DST starts annually on the last Sunday of March. Clocks are turned forward 1 hour to Sunday, March 29, 2026 at 2:00 amSunday, March 29, 2026 at 02:00 local daylight time instead. Also called Spring Forward or Summer Time.
Sunday, October 25, 2026 at 2:00 amSunday, October 25, 2026 at 02:00 local time. DST ends annually on the last Sunday of October. Clocks are turned backward 1 hour to Sunday, October 25, 2026 at 1:00 amSunday, October 25, 2026 at 01:00 local standard time instead. Also called Fall Back or switch to Winter Time.London Facts
Central Standard Time
Offset: CST is 6 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries using this time zone: Belize, Canada, Costa Rica, Guatemala, Honduras, Mexico, Nicaragua, El Salvador, United States
Principal Cities: The largest city in the CST time zone is Mexico City in Mexico, with about 12.294 million people. Other major cities in this time zone include Chicago, Houston, Iztapalapa, Ecatepec.
French: HNC - Heure Normale du Centre
Spanish: CT - Tiempo Central Estándar, CT - Zona Centro
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Central Daylight Time (CDT).
End: Central Standard Time (CST) ended on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.
Start: Central Standard Time (CST) starts on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.
CST representations, usage and related time zones
- -06 - basic short
- -0600 - basic
- -06:00 - extended
- -0600 - sign character (-) followed by a four digit time providing hours (06) and minutes (00) of the offset. Indicates an offset of six hours to the west of the zero meridian.
- Sierra - Military abbreviation for CST
- S - short form of 'Sierra'
- America/Bahia_Banderas
- America/Belize
- America/Chicago
- America/Chihuahua
- America/Costa_Rica
- America/El_Salvador
- America/Guatemala
- America/Indiana/Knox
- America/Indiana/Tell_City
- America/Knox_IN
- America/Managua
- America/Matamoros
- America/Menominee
- America/Merida
- America/Mexico_City
- America/Monterrey
- America/North_Dakota/Beulah
- America/North_Dakota/Center
- America/North_Dakota/New_Salem
- America/Ojinaga
- America/Rainy_River
- America/Rankin_Inlet
- America/Regina
- America/Resolute
- America/Swift_Current
- America/Tegucigalpa
- America/Winnipeg
- CST6CDT
- Canada/Central
- Canada/Saskatchewan
- Mexico/General
- US/Central
- US/Indiana-Starke
- Central Standard Time - UTC -6
- China Standard Time - UTC +8
- Cuba Standard Time - UTC -5
- CST - Central Standard Time
- CT - Central Time
- MDT - Mountain Daylight Time
- EAST - Easter Island Standard Time
- GALT - Galapagos Time
- S - Sierra Time Zone
Auckland Information
Time Zone
NZST - New Zealand Standard Time
+12:00 hours during New Zealand Standard Time.
Sunday, September 27, 2026 at 2:00 amSunday, September 27, 2026 at 02:00 local time. DST starts annually on the last Sunday of September. Clocks are turned forward 1 hour to Sunday, September 27, 2026 at 3:00 amSunday, September 27, 2026 at 03:00 local daylight time instead. Also called Spring Forward or Summer Time.
Sunday, April 5, 2026 at 3:00 amSunday, April 5, 2026 at 03:00 local time. DST ends annually on the 1st Sunday of April. Clocks are turned backward 1 hour to Sunday, April 5, 2026 at 2:00 amSunday, April 5, 2026 at 02:00 local standard time instead. Also called Fall Back or switch to Winter Time.Auckland Facts
Australian Central Daylight Time
Offset: ACDT is 10 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Australia
Countries using this time zone: Australia
Principal Cities: The largest city in the ACDT time zone is Adelaide in Australia, with about 1.469 million people. Other major cities in this time zone include Adelaide Hills, Mount Gambier, Morphett Vale, Broken Hill.
Daylight Saving: Australian Central Daylight Time (ACDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Australian Central Standard Time (ACST).
Start: Australian Central Daylight Time (ACDT) started on Sunday, October 4, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, October 4, 2026, 3:00 am03:00. Daylight saving starts annually on the first Sunday of October.
End: Australian Central Daylight Time (ACDT) ends on Sunday, April 4, 2027 at 3:00 am03:00 local time and clocks are set one hour back to Sunday, April 4, 2027, 2:00 am02:00 local standard time instead. Daylight saving ends annually on the first Sunday of April.
ACDT representations, usage and related time zones
- +1030 - basic
- +10:30 - extended
- +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.
- Australia/Adelaide
- Australia/Broken_Hill
- Australia/South
- Australia/Yancowinna
- ACDT - Australian Central Daylight Time
- LHST - Lord Howe Standard Time
Tokyo Information
Time Zone
Tokyo Facts
Singapore Time
Offset: SGT is 8 hours ahead Greenwich Mean Time (GMT) and is used in Asia
Countries using this time zone: Singapore
Principal Cities: The largest city in the SGT time zone is Singapore in Singapore, with about 5.639 million people.
Daylight Saving: Clocks in Singapore Time (SGT) do not change for daylight saving time, so SGT stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
SGT representations, usage and related time zones
- +08 - basic short
- +0800 - basic
- +08:00 - extended
- +0800 - sign character (+) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates an offset of eight hours to the east of the zero meridian.
- Hotel - Military abbreviation for SGT
- H - short form of 'Hotel'
- ACT - ASEAN Common Time
- AWST - Australian Western Standard Time
- BNT - Brunei Darussalam Time
- CAST - Casey Time
- CHOT - Choibalsan Time
- CST - China Standard Time
- H - Hotel Time Zone
- HKT - Hong Kong Time
- HOVST - Hovd Summer Time
- IRKT - Irkutsk Time
- KRAST - Krasnoyarsk Summer Time
- MYT - Malaysia Time
- PHT - Philippine Time
- SGT - Singapore Time
- ULAT - Ulaanbaatar Time
- WITA - Central Indonesian Time