BST to GMT to PST to EST to CST to IST Time Converter
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Selected conversion
12:00 pm12:00 GMT (UTC+0), Nov 4, 2026 = 12:00 pm12:00 GMT (UTC+0), Nov 4, 2026 = 4:00 am04:00 PST (UTC-8), Nov 4, 2026 = 7:00 am07:00 EST (UTC-5), Nov 4, 2026 = 6:00 am06:00 CST (UTC-6), Nov 4, 2026 = 5:30 pm17:30 IST (UTC+5:30), Nov 4, 2026
GMT and GMT have the same local time. GMT is 8 hours ahead of PST. GMT is 5 hours ahead of EST. GMT is 6 hours ahead of CST. GMT is 5 hours and 30 minutes behind IST.
How the time difference changes
BST to GMT
For most of the year, BST is 1 hour ahead of GMT. From Oct 25, 2026 to Mar 28, 2027, and from Oct 31, 2027 to Mar 26, 2028, the BST and GMT converter rows show the same time.
For most of the year, working hours of 9:00 am to 6:00 pm in BST correspond to 8:00 am to 5:00 pm in GMT. At other times of the year, working hours of 9:00 am to 6:00 pm on the BST converter row correspond to 9:00 am to 6:00 pm on the GMT converter row.For most of the year, working hours of 09:00 to 18:00 in BST correspond to 08:00 to 17:00 in GMT. At other times of the year, working hours of 09:00 to 18:00 on the BST converter row correspond to 09:00 to 18:00 on the GMT converter row.
BST to PST
For most of the year, BST is 8 hours ahead of PDT. From Nov 1, 2026 to Mar 14, 2027, GMT is 8 hours ahead of PST. From Mar 14 to Mar 28, 2027, and from Oct 31 to Nov 7, 2027, GMT is 7 hours ahead of PDT.
For most of the year, working hours of 9:00 am to 6:00 pm in BST correspond to 1:00 am to 10:00 am in PDT. At other times of the year, working hours of 9:00 am to 6:00 pm in GMT correspond to 1:00 am to 10:00 am in PST or working hours of 9:00 am to 6:00 pm in GMT correspond to 2:00 am to 11:00 am in PDT.For most of the year, working hours of 09:00 to 18:00 in BST correspond to 01:00 to 10:00 in PDT. At other times of the year, working hours of 09:00 to 18:00 in GMT correspond to 01:00 to 10:00 in PST or working hours of 09:00 to 18:00 in GMT correspond to 02:00 to 11:00 in PDT.
BST to EST
For most of the year, BST is 5 hours ahead of EDT. From Nov 1, 2026 to Mar 14, 2027, GMT is 5 hours ahead of EST. From Mar 14 to Mar 28, 2027, and from Oct 31 to Nov 7, 2027, GMT is 4 hours ahead of EDT.
For most of the year, working hours of 9:00 am to 6:00 pm in BST correspond to 4:00 am to 1:00 pm in EDT. At other times of the year, working hours of 9:00 am to 6:00 pm in GMT correspond to 4:00 am to 1:00 pm in EST or working hours of 9:00 am to 6:00 pm in GMT correspond to 5:00 am to 2:00 pm in EDT.For most of the year, working hours of 09:00 to 18:00 in BST correspond to 04:00 to 13:00 in EDT. At other times of the year, working hours of 09:00 to 18:00 in GMT correspond to 04:00 to 13:00 in EST or working hours of 09:00 to 18:00 in GMT correspond to 05:00 to 14:00 in EDT.
BST to CST
For most of the year, BST is 6 hours ahead of CDT. From Nov 1, 2026 to Mar 14, 2027, GMT is 6 hours ahead of CST. From Mar 14 to Mar 28, 2027, and from Oct 31 to Nov 7, 2027, GMT is 5 hours ahead of CDT.
For most of the year, working hours of 9:00 am to 6:00 pm in BST correspond to 3:00 am to 12:00 pm in CDT. At other times of the year, working hours of 9:00 am to 6:00 pm in GMT correspond to 3:00 am to 12:00 pm in CST or working hours of 9:00 am to 6:00 pm in GMT correspond to 4:00 am to 1:00 pm in CDT.For most of the year, working hours of 09:00 to 18:00 in BST correspond to 03:00 to 12:00 in CDT. At other times of the year, working hours of 09:00 to 18:00 in GMT correspond to 03:00 to 12:00 in CST or working hours of 09:00 to 18:00 in GMT correspond to 04:00 to 13:00 in CDT.
BST to IST
For most of the year, BST is 4 hours and 30 minutes behind IST. From Oct 25, 2026 to Mar 28, 2027, and from Oct 31, 2027 to Mar 26, 2028, GMT is 5 hours and 30 minutes behind IST.
For most of the year, working hours of 9:00 am to 6:00 pm in BST correspond to 1:30 pm to 10:30 pm in IST. At other times of the year, working hours of 9:00 am to 6:00 pm in GMT correspond to 2:30 pm to 11:30 pm in IST.For most of the year, working hours of 09:00 to 18:00 in BST correspond to 13:30 to 22:30 in IST. At other times of the year, working hours of 09:00 to 18:00 in GMT correspond to 14:30 to 23:30 in IST.
Compare BST time with GMT, PST, EST, CST, and IST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Greenwich Mean Time and Greenwich Mean Time have the same local time. Greenwich Mean Time is 8 hours ahead of Pacific Standard Time. Greenwich Mean Time is 5 hours ahead of Eastern Standard Time. Greenwich Mean Time is 6 hours ahead of Central Standard Time. Greenwich Mean Time is 5 hours and 30 minutes behind India Standard Time.
12:00 pm12:00 in GMT is 12:00 pm12:00 in GMT and is 4:00 am04:00 in PST and is 7:00 am07:00 in EST and is 6:00 am06:00 in CST and is 5:30 pm17:30 in IST
GMT to GMT call time
Best time for a conference call or a meeting is between 9am-6pm09:00-18:00 in GMT which corresponds to 9am-6pm09:00-18:00 in GMT
GMT to PST call time
Best time for a conference call or a meeting is between 5pm-6pm17:00-18:00 in GMT which corresponds to 9am-10am09:00-10:00 in PST
GMT to EST call time
Best time for a conference call or a meeting is between 2pm-6pm14:00-18:00 in GMT which corresponds to 9am-1pm09:00-13:00 in EST
GMT to CST call time
Best time for a conference call or a meeting is between 3pm-6pm15:00-18:00 in GMT which corresponds to 9am-12pm09:00-12:00 in CST
GMT to IST call time
Best time for a conference call or a meeting is between 9am-12:30pm09:00-12:30 in GMT which corresponds to 2:30pm-6pm14:30-18:00 in IST
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
4:00 am04:00 Pacific Standard Time (PST). Offset UTC -8:00 hours
7:00 am07:00 Eastern Standard Time (EST). Offset UTC -5:00 hours
6:00 am06:00 Central Standard Time (CST). Offset UTC -6:00 hours
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
12:00 pm12:00 GMT / 12:00 pm12:00 GMT / 4:00 am04:00 PST / 7:00 am07:00 EST / 6:00 am06:00 CST / 5:30 pm17:30 IST
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.
| GMT | GMT | PST | EST | CST | IST |
|---|---|---|---|---|---|
| 12:00am | 4:00pm previous day | 7:00pm previous day | 6:00pm previous day | 5:30am | |
| 1:00am | 5:00pm previous day | 8:00pm previous day | 7:00pm previous day | 6:30am | |
| 2:00am | 6:00pm previous day | 9:00pm previous day | 8:00pm previous day | 7:30am | |
| 3:00am | 7:00pm previous day | 10:00pm previous day | 9:00pm previous day | 8:30am | |
| 4:00am | 8:00pm previous day | 11:00pm previous day | 10:00pm previous day | 9:30am | |
| 5:00am | 9:00pm previous day | 12:00am | 11:00pm previous day | 10:30am | |
| 6:00am | 10:00pm previous day | 1:00am | 12:00am | 11:30am | |
| 7:00am | 11:00pm previous day | 2:00am | 1:00am | 12:30pm | |
| 8:00am | 12:00am | 3:00am | 2:00am | 1:30pm | |
| 9:00am | 1:00am | 4:00am | 3:00am | 2:30pm | |
| 10:00am | 2:00am | 5:00am | 4:00am | 3:30pm | |
| 11:00am | 3:00am | 6:00am | 5:00am | 4:30pm | |
| 12:00pm | 4:00am | 7:00am | 6:00am | 5:30pm | |
| 1:00pm | 5:00am | 8:00am | 7:00am | 6:30pm | |
| 2:00pm | 6:00am | 9:00am | 8:00am | 7:30pm | |
| 3:00pm | 7:00am | 10:00am | 9:00am | 8:30pm | |
| 4:00pm | 8:00am | 11:00am | 10:00am | 9:30pm | |
| 5:00pm | 9:00am | 12:00pm | 11:00am | 10:30pm | |
| 6:00pm | 10:00am | 1:00pm | 12:00pm | 11:30pm | |
| 7:00pm | 11:00am | 2:00pm | 1:00pm | 12:30am next day | |
| 8:00pm | 12:00pm | 3:00pm | 2:00pm | 1:30am next day | |
| 9:00pm | 1:00pm | 4:00pm | 3:00pm | 2:30am next day | |
| 10:00pm | 2:00pm | 5:00pm | 4:00pm | 3:30am next day | |
| 11:00pm | 3:00pm | 6:00pm | 5:00pm | 4:30am next day | |
| 00:00 | 16:00 previous day | 19:00 previous day | 18:00 previous day | 05:30 | |
| 01:00 | 17:00 previous day | 20:00 previous day | 19:00 previous day | 06:30 | |
| 02:00 | 18:00 previous day | 21:00 previous day | 20:00 previous day | 07:30 | |
| 03:00 | 19:00 previous day | 22:00 previous day | 21:00 previous day | 08:30 | |
| 04:00 | 20:00 previous day | 23:00 previous day | 22:00 previous day | 09:30 | |
| 05:00 | 21:00 previous day | 00:00 | 23:00 previous day | 10:30 | |
| 06:00 | 22:00 previous day | 01:00 | 00:00 | 11:30 | |
| 07:00 | 23:00 previous day | 02:00 | 01:00 | 12:30 | |
| 08:00 | 00:00 | 03:00 | 02:00 | 13:30 | |
| 09:00 | 01:00 | 04:00 | 03:00 | 14:30 | |
| 10:00 | 02:00 | 05:00 | 04:00 | 15:30 | |
| 11:00 | 03:00 | 06:00 | 05:00 | 16:30 | |
| 12:00 | 04:00 | 07:00 | 06:00 | 17:30 | |
| 13:00 | 05:00 | 08:00 | 07:00 | 18:30 | |
| 14:00 | 06:00 | 09:00 | 08:00 | 19:30 | |
| 15:00 | 07:00 | 10:00 | 09:00 | 20:30 | |
| 16:00 | 08:00 | 11:00 | 10:00 | 21:30 | |
| 17:00 | 09:00 | 12:00 | 11:00 | 22:30 | |
| 18:00 | 10:00 | 13:00 | 12:00 | 23:30 | |
| 19:00 | 11:00 | 14:00 | 13:00 | 00:30 next day | |
| 20:00 | 12:00 | 15:00 | 14:00 | 01:30 next day | |
| 21:00 | 13:00 | 16:00 | 15:00 | 02:30 next day | |
| 22:00 | 14:00 | 17:00 | 16:00 | 03:30 next day | |
| 23:00 | 15:00 | 18:00 | 17:00 | 04:30 next day |
British Summer Time
Offset: BST is 1 hour ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Guernsey, Isle of Man, Jersey, United Kingdom
Principal Cities: The largest city in the BST time zone is London in the United Kingdom, with about 8.962 million people. Other major cities in this time zone include Birmingham, Glasgow, Manchester, Sheffield.
Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, and in casual use the two are the same. In the military, GMT is known as Zulu time. Greenwich Mean Time was the same as Universal Time (UT), a standard astronomical concept used in many technical fields, until the introduction of UTC in 1972.
Current time in the United Kingdom: UK time now
Today the shaded areas are on UTC+0 (GMT).
BST representations, usage and related time zones
- +01 - basic short
- +0100 - basic
- +01:00 - extended
- +0100 - sign character (+) followed by a four digit time providing hours (01) and minutes (00) of the offset. Indicates an offset of one hour to the east of the zero meridian.
- Alpha - Military abbreviation for BST
- A - short form of 'Alpha'
- Europe/Belfast
- Europe/Guernsey
- Europe/Isle_of_Man
- Europe/Jersey
- Europe/London
- GB
- GB-Eire
- British Summer Time - UTC +1
- Bangladesh Standard Time - UTC +6
- Bougainville Standard Time - UTC +11
- BST - British Summer Time
- CET - Central European Time
- IST - Irish Standard Time
- WEST - Western European Summer Time
- A - Alpha Time Zone
- CET - Central European Time
- MEZ - Mitteleuropäische Zeit
- WAT - West Africa Time
- WST - Western Sahara Summer Time
- BMT - Biel Mean Time
Greenwich Mean Time
Offset: GMT is the same as Greenwich Mean Time (GMT).
Countries using this time zone: Antarctica, Burkina Faso, Gambia, Ghana, Greenland, Guernsey, Guinea, Guinea-Bissau, Iceland, Ireland, Isle of Man, Ivory Coast, Jersey, Liberia, Mali, Mauritania, Morocco, Saint Helena, São Tomé and Príncipe, Senegal, Sierra Leone, Togo, United Kingdom, Western Sahara
Principal Cities: The largest city in the GMT time zone is London in the United Kingdom, with about 8.962 million people. Other major cities in this time zone include Abidjan, Bamako, Casablanca, Dakar.
Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, and in casual use the two are the same. In the military, GMT is known as Zulu time. Greenwich Mean Time was the same as Universal Time (UT), a standard astronomical concept used in many technical fields, until the introduction of UTC in 1972.
Today all shaded areas are on GMT.
GMT representations, usage and related time zones
- Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
- +00 - basic short
- +0000 - basic
- +00:00 - extended
- +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
- Zulu - Military abbreviation for GMT
- Z - short form of 'Zulu'
- Africa/Abidjan
- Africa/Accra
- Africa/Bamako
- Africa/Banjul
- Africa/Bissau
- Africa/Conakry
- Africa/Dakar
- Africa/Freetown
- Africa/Lome
- Africa/Monrovia
- Africa/Nouakchott
- Africa/Ouagadougou
- Africa/Sao_Tome
- Africa/Timbuktu
- America/Danmarkshavn
- Atlantic/Reykjavik
- Atlantic/St_Helena
- Eire
- Etc/GMT
- Etc/GMT+0
- Etc/GMT-0
- Etc/GMT0
- Etc/Greenwich
- Europe/Belfast
- Europe/Dublin
- Europe/Guernsey
- Europe/Isle_of_Man
- Europe/Jersey
- Europe/London
- GB
- GB-Eire
- GMT
- GMT+0
- GMT-0
- GMT0
- Greenwich
- Iceland
- EGST - Eastern Greenland Summer Time
- GMT - Greenwich Mean Time
- WET - Western European Time
- AZOST - Azores Summer Time
- UTC - Coordinated Universal Time
- WT - Western Sahara Standard Time
- Z - Zulu Time Zone
Pacific Standard Time
Offset: PST is 8 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Mexico, United States
Principal Cities: The largest city in the PST time zone is Los Angeles in the United States, with about 3.821 million people. Other major cities in this time zone include Tijuana, San Diego, Mexicali, San Jose.
French: HNP - Heure Normale du Pacifique
Spanish: PT - Tiempo del Pacífico, PT - Zona Noroeste
Today all shaded areas are on PST.
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Pacific Daylight Time (PDT).
Start: Pacific Standard Time (PST) started on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.
End: Pacific Standard Time (PST) ends on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.
See USA daylight saving time and upcoming clock changes worldwide.
PST 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 west of the zero meridian.
- Uniform - Military abbreviation for PST
- U - short form of 'Uniform'
- America/Ensenada
- America/Los_Angeles
- America/Santa_Isabel
- America/Tijuana
- America/Vancouver
- Canada/Pacific
- Mexico/BajaNorte
- PST8PDT
- US/Pacific
- Pacific Standard Time - UTC -8
- Pitcairn Standard Time - UTC -8
- AKDT - Alaska Daylight Time
- PST - Pacific Standard Time
- PT - Pacific Time
- PST - Pitcairn Standard Time
- U - Uniform Time Zone
Eastern Standard Time
Offset: EST is 5 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Bahamas, Canada, Cayman Islands, Haiti, Jamaica, Mexico, Panama, Turks and Caicos Islands, United States
Principal Cities: The largest city in the EST time zone is New York City in the United States, with about 8.804 million people. Other major cities in this time zone include Toronto, Montréal, Philadelphia, Port-au-Prince.
French: HNE - Heure Normale de l'Est
Spanish: ET - Tiempo del Este, ET - Zona Sureste
Today all shaded areas are on EST.
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Eastern Daylight Time (EDT).
Start: Eastern Standard Time (EST) started on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.
End: Eastern Standard Time (EST) ends on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.
See USA daylight saving time and upcoming clock changes worldwide.
EST representations, usage and related time zones
- -05 - basic short
- -0500 - basic
- -05:00 - extended
- -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the west of the zero meridian.
- Romeo - Military abbreviation for EST
- R - short form of 'Romeo'
- America/Atikokan
- America/Cancun
- America/Cayman
- America/Coral_Harbour
- America/Detroit
- America/Fort_Wayne
- America/Grand_Turk
- America/Indiana/Indianapolis
- America/Indiana/Marengo
- America/Indiana/Petersburg
- America/Indiana/Vevay
- America/Indiana/Vincennes
- America/Indiana/Winamac
- America/Indianapolis
- America/Iqaluit
- America/Jamaica
- America/Kentucky/Louisville
- America/Kentucky/Monticello
- America/Louisville
- America/Montreal
- America/Nassau
- America/New_York
- America/Nipigon
- America/Panama
- America/Pangnirtung
- America/Port-au-Prince
- America/Thunder_Bay
- America/Toronto
- Canada/Eastern
- EST
- EST5EDT
- Jamaica
- US/East-Indiana
- US/Eastern
- US/Michigan
- CDT - Central Daylight Time
- EST - Eastern Standard Time
- ET - Eastern Time
- COT - Colombia Time
- CST - Cuba Standard Time
- EASST - Easter Island Summer Time
- ECT - Ecuador Time
- PET - Peru Time
- R - Romeo Time Zone
Central Standard Time
Offset: CST is 6 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Belize, Canada, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, 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, Puebla, Santiago de Querétaro.
French: HNC - Heure Normale du Centre
Spanish: CT - Tiempo Central Estándar, CT - Zona Centro
Today all shaded areas are on CST.
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).
Start: Central Standard Time (CST) started on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.
End: Central Standard Time (CST) ends on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.
See USA daylight saving time and upcoming clock changes worldwide.
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
India Standard Time
Offset: IST is 5 hours and 30 minutes ahead of Greenwich Mean Time (GMT).
Countries using this time zone: India
Principal Cities: The largest city in the IST time zone is Mumbai in India, with about 12.692 million people. Other major cities in this time zone include Delhi, Bengaluru, Hyderabad, Ahmedabad.
Daylight Saving: Clocks in India Standard Time (IST) do not change for daylight saving time, so IST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
Current time in India: India time now
IST representations, usage and related time zones
- +0530 - basic
- +05:30 - extended
- +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates an offset of five hours and thirty minutes to the east of the zero meridian.
- Asia/Calcutta
- Asia/Kolkata
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2