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GMT
Greenwich Mean Time
GMT +0
PDT/PST
PST automatically adjusted to PDT time zone, that is in use
CEST
Central European Summer Time
GMT +2
EDT/EST
Eastern Daylight Time
GMT -4
EST automatically adjusted to EDT time zone, that is in use
Time Difference
Greenwich Mean Time is 7 hours ahead of Pacific Daylight Time and 2 hours behind Central European Summer Time and 4 hours ahead of Eastern Daylight Time and 5 hours and 30 minutes behind India Standard Time
4:30 am04:30 in GMT is 9:30 pm21:30 in PDT and is 6:30 am06:30 in CEST and is 12:30 am00:30 in EDT and is 10:00 am10:00 in IST
GMT to PST call time
Best time for a conference call or a meeting is between 4pm-6pm in GMT which corresponds to 8am-10am in PST
GMT to CEST call time
Best time for a conference call or a meeting is between 8am-4pm in GMT which corresponds to 10am-6pm in CEST
GMT to EST call time
Best time for a conference call or a meeting is between 1pm-6pm in GMT which corresponds to 8am-1pm in EST
GMT to IST call time
Best time for a conference call or a meeting is between 8am-12:30pm in GMT which corresponds to 1:30pm-6pm in IST
4:30 am04:30 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
9:30 pm21:30 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
6:30 am06:30 Central European Summer Time (CEST). Offset UTC +2:00 hours
12:30 am00:30 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
10:00 am10:00 India Standard Time (IST). Offset UTC +5:30 hours
4:30 am04:30 GMT / 9:30 pm21:30 PDT / 6:30 am06:30 CEST / 12:30 am00:30 EDT / 10:00 am10:00 IST
| GMT | PDT | CEST | EDT | IST |
|---|---|---|---|---|
| 12am (midnight) | 5pm | 2am | 8pm | 5:30 am |
| 1am | 6pm | 3am | 9pm | 6:30 am |
| 2am | 7pm | 4am | 10pm | 7:30 am |
| 3am | 8pm | 5am | 11pm | 8:30 am |
| 4am | 9pm | 6am | 12am (midnight) | 9:30 am |
| 5am | 10pm | 7am | 1am | 10:30 am |
| 6am | 11pm | 8am | 2am | 11:30 am |
| 7am | 12am (midnight) | 9am | 3am | 12:30 pm |
| 8am | 1am | 10am | 4am | 1:30 pm |
| 9am | 2am | 11am | 5am | 2:30 pm |
| 10am | 3am | 12pm (noon) | 6am | 3:30 pm |
| 11am | 4am | 1pm | 7am | 4:30 pm |
| 12pm (noon) | 5am | 2pm | 8am | 5:30 pm |
| 1pm | 6am | 3pm | 9am | 6:30 pm |
| 2pm | 7am | 4pm | 10am | 7:30 pm |
| 3pm | 8am | 5pm | 11am | 8:30 pm |
| 4pm | 9am | 6pm | 12pm (noon) | 9:30 pm |
| 5pm | 10am | 7pm | 1pm | 10:30 pm |
| 6pm | 11am | 8pm | 2pm | 11:30 pm |
| 7pm | 12pm (noon) | 9pm | 3pm | 12:30 am |
| 8pm | 1pm | 10pm | 4pm | 1:30 am |
| 9pm | 2pm | 11pm | 5pm | 2:30 am |
| 10pm | 3pm | 12am (midnight) | 6pm | 3:30 am |
| 11pm | 4pm | 1am | 7pm | 4:30 am |
| 0:00 | 17:00 | 2:00 | 20:00 | 5:30 |
| 1:00 | 18:00 | 3:00 | 21:00 | 6:30 |
| 2:00 | 19:00 | 4:00 | 22:00 | 7:30 |
| 3:00 | 20:00 | 5:00 | 23:00 | 8:30 |
| 4:00 | 21:00 | 6:00 | 0:00 | 9:30 |
| 5:00 | 22:00 | 7:00 | 1:00 | 10:30 |
| 6:00 | 23:00 | 8:00 | 2:00 | 11:30 |
| 7:00 | 0:00 | 9:00 | 3:00 | 12:30 |
| 8:00 | 1:00 | 10:00 | 4:00 | 13:30 |
| 9:00 | 2:00 | 11:00 | 5:00 | 14:30 |
| 10:00 | 3:00 | 12:00 | 6:00 | 15:30 |
| 11:00 | 4:00 | 13:00 | 7:00 | 16:30 |
| 12:00 | 5:00 | 14:00 | 8:00 | 17:30 |
| 13:00 | 6:00 | 15:00 | 9:00 | 18:30 |
| 14:00 | 7:00 | 16:00 | 10:00 | 19:30 |
| 15:00 | 8:00 | 17:00 | 11:00 | 20:30 |
| 16:00 | 9:00 | 18:00 | 12:00 | 21:30 |
| 17:00 | 10:00 | 19:00 | 13:00 | 22:30 |
| 18:00 | 11:00 | 20:00 | 14:00 | 23:30 |
| 19:00 | 12:00 | 21:00 | 15:00 | 0:30 |
| 20:00 | 13:00 | 22:00 | 16:00 | 1:30 |
| 21:00 | 14:00 | 23:00 | 17:00 | 2:30 |
| 22:00 | 15:00 | 0:00 | 18:00 | 3:30 |
| 23:00 | 16:00 | 1:00 | 19:00 | 4:30 |
Greenwich Mean Time
Offset: GMT is 0 hours ahead Greenwich Mean Time (GMT) and is used in Europe
Countries: It is used in following countries: Burkina Faso, Côte d'Ivoire, Britain (UK), Guernsey, Ghana, Greenland, Gambia, Guinea, Guinea-Bissau, Ireland, Isle of Man, Iceland, Jersey, Liberia, Mali, Mauritania, St Helena, Sierra Leone, Senegal, Sao Tome & Principe, Togo
Principal Cities: The largest city in the GMT timezone is London from United Kingdom with population about 7.557 million people. Other major cities in the area are Abidjan, Dakar, Grand Dakar, Accra
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 for the most parts it is the same. In military GMT is known as Zulu time.Greenwich Mean Time was the same as Universal Time (UT), until the introduction of UTC in 1972 a standard astronomical concept used in many technical fields.
GMT representations, usage and related time zones
W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
- Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
- +00 - basic short
- +0000 - basic
- +00:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
- +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates zero hour and zero minutes time differences of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
- Zulu - Military abbreviation for GMT
- Z - short form of 'Zulu'
IANA/Olson: Reflects GMT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
- 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
GMT Abbreviation: Several time zones share GMT abbreviation and it could refer to these time zones
- Greenwich Mean Time - UTC +0
- GMT+03:00 - UTC +3
- GMT - UTC +1
- GMT+06:00 - UTC +6
- GMT-01:00 - UTC -1
- GMT+11:00 - UTC +11
Time zones with the GMT +0 offset:
- EGST - Eastern Greenland Summer Time
- GMT - Greenwich Mean Time
- WET - Western European Time
- AZOST - Azores Summer Time
- UTC - Universal Time Coordinated
- WT - Western Sahara Standard Time
- Z - Zulu Time Zone
Pacific Standard Time
Offset: PST is 8 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries: It is used in following countries: Canada, Mexico, United States
Principal Cities: The largest city in the PST timezone is Los Angeles from USA with population about 3.793 million people. Other major cities in the area are Vancouver, Tijuana, San Diego, San Jose
French: HNP - Heure Normale du Pacifique
Spanish: PT - Tiempo del Pacífico, PT - Zona Noroeste
Daylight Saving: This is a standard time zone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Pacific Daylight Time (PDT).
End: Pacific Standard Time (PST) has ended on Sunday, March 10, 2024 at 2:00 am local time and clocks were set one hour forward to Sunday, March 10, 2024, 3:00 am local daylight time instead. Standard time ends annually the on second Sunday of March.
Start: Pacific Standard Time (PST) starts on Sunday, November 3, 2024 at 2:00 am local time and clocks are set one hour back to Sunday, November 3, 2024, 1:00 am. Standard time starts annually the on first Sunday of November.
PST representations, usage and related time zones
W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
- -08 - basic short
- -0800 - basic
- -08:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
- -0800 - sign character (-) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates eight hour and zero minutes time differences to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
- Uniform - Military abbreviation for PST
- U - short form of 'Uniform'
IANA/Olson: Reflects PST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
- America/Ensenada
- America/Los_Angeles
- America/Santa_Isabel
- America/Tijuana
- America/Vancouver
- Canada/Pacific
- Mexico/BajaNorte
- PST8PDT
- US/Pacific
PST Abbreviation: Several time zones share PST abbreviation and it could refer to these time zones
- Pacific Standard Time - UTC -8
- Pitcairn Standard Time - UTC -8
- Peru Standard Time - UTC -5
Time zones with the GMT -8 offset:
- AKDT - Alaska Daylight Time
- PST - Pacific Standard Time
- PT - Pacific Time
- PST - Pitcairn Standard Time
- U - Uniform Time Zone
Central European Summer Time
Offset: CEST is 2 hours ahead Greenwich Mean Time (GMT) and is used in Europe
Countries: It is used in following countries: Andorra, Albania, Austria, Bosnia & Herzegovina, Belgium, Switzerland, Czech Republic, Germany, Denmark, Spain, France, Gibraltar, Croatia, Hungary, Italy, Liechtenstein, Luxembourg, Monaco, Montenegro, North Macedonia, Malta, Netherlands, Norway, Poland, Serbia, Sweden, Slovenia, Svalbard & Jan Mayen, Slovakia, San Marino, Vatican City
Principal Cities: The largest city in the CEST timezone is Berlin from Germany with population about 3.426 million people. Other major cities in the area are Madrid, Rome, Paris, Budapest
German: MESZ - Mitteleuropäische Sommerzeit
Daylight Saving: Central European Summer Time (CEST) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Central European Time (CET).
Start: Central European Summer Time (CEST) started on Sunday, March 31, 2024 at 2:00 am local time and clocks were set one hour forward to Sunday, March 31, 2024, 3:00 am. Daylight saving starts annually the on last Sunday of March
End: Central European Summer Time (CEST) ends on Sunday, October 27, 2024 at 3:00 am local time and clocks are set one hour back to Sunday, October 27, 2024, 2:00 am local standard time instead. Daylight saving ends annually the on last Sunday of October
CEST representations, usage and related time zones
W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
- +02 - basic short
- +0200 - basic
- +02:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
- +0200 - sign character (+) followed by a four digit time providing hours (02) and minutes (00) of the offset. Indicates two hour and zero minutes time differences to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
- Bravo - Military abbreviation for CEST
- B - short form of 'Bravo'
IANA/Olson: Reflects CEST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
- Africa/Ceuta
- Arctic/Longyearbyen
- Atlantic/Jan_Mayen
- CET
- Europe/Amsterdam
- Europe/Andorra
- Europe/Belgrade
- Europe/Berlin
- Europe/Bratislava
- Europe/Brussels
- Europe/Budapest
- Europe/Busingen
- Europe/Copenhagen
- Europe/Gibraltar
- Europe/Ljubljana
- Europe/Luxembourg
- Europe/Madrid
- Europe/Malta
- Europe/Monaco
- Europe/Oslo
- Europe/Paris
- Europe/Podgorica
- Europe/Prague
- Europe/Rome
- Europe/San_Marino
- Europe/Sarajevo
- Europe/Skopje
- Europe/Stockholm
- Europe/Tirane
- Europe/Vaduz
- Europe/Vatican
- Europe/Vienna
- Europe/Warsaw
- Europe/Zagreb
- Europe/Zurich
- Poland
Time zones with the GMT +2 offset:
- CEST - Central European Summer Time
- EET - Eastern European Time
- MESZ - Mitteleuropäische Sommerzeit
- B - Bravo Time Zone
- CAT - Central Africa Time
- IST - Israel Standard Time
- SAST - South Africa Standard Time
- WAST - West Africa Summer Time
Eastern Standard Time
Offset: EST is 5 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries: It is used in following countries: Bahamas, Canada, Haiti, Jamaica, Cayman Islands, Mexico, Panama, Turks & Caicos Is, United States
Principal Cities: The largest city in the EST timezone is New York City from USA with population about 8.175 million people. Other major cities in the area are Toronto, Montreal, Brooklyn, Borough of Queens
French: HNE - Heure Normale de l'Est
Spanish: ET - Tiempo del Este, ET - Zona Sureste
Daylight Saving: This is a standard time zone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Eastern Daylight Time (EDT).
End: Eastern Standard Time (EST) has ended on Sunday, March 10, 2024 at 2:00 am local time and clocks were set one hour forward to Sunday, March 10, 2024, 3:00 am local daylight time instead. Standard time ends annually the on second Sunday of March.
Start: Eastern Standard Time (EST) starts on Sunday, November 3, 2024 at 2:00 am local time and clocks are set one hour back to Sunday, November 3, 2024, 1:00 am. Standard time starts annually the on first Sunday of November.
EST representations, usage and related time zones
W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
- -05 - basic short
- -0500 - basic
- -05:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
- -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates five hour and zero minutes time differences to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
- Romeo - Military abbreviation for EST
- R - short form of 'Romeo'
IANA/Olson: Reflects EST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
- 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
Time zones with the GMT -5 offset:
- 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
India Standard Time
Offset: IST is 5 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia
Countries: It is used in following countries: India
Principal Cities: The largest city in the IST timezone is Mumbai from India with population about 12.692 million people. Other major cities in the area are Delhi, Bangalore, Kolkata, Chennai
Daylight Saving: India Standard Time (IST) is not adjusted for daylight saving therefore IST remains the same through out the year. This means, unlike some time zones where the clock is set forward by one hour every summer and backward by one hour during winter to adjust for daylight saving, India Standard Time remains the same
IST representations, usage and related time zones
W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
- +0530 - basic
- +05:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
- +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates five hour and thirty minutes time differences to the east of the zero meridian.
IANA/Olson: Reflects IST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
- Asia/Calcutta
- Asia/Kolkata
IST Abbreviation: Several time zones share IST abbreviation and it could refer to these time zones
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2
- Iran Standard Time - UTC +3:30
EST to IST GMT to EST PST to EST EST to GMT PST to GMT
