GMT to EST to PDT to SGT to IST
Time Difference
Greenwich Mean Time is 4 hours ahead of Eastern Daylight Time and 7 hours ahead of Pacific Daylight Time and 8 hours behind Singapore Time and 5 hours and 30 minutes behind India Standard Time
12:30 pm12:30 in GMT is 8:30 am08:30 in EDT and is 5:30 am05:30 in PDT and is 8:30 pm20:30 in SGT and is 6:00 pm18:00 in IST
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 PDT call time
Best time for a conference call or a meeting is between 3pm-6pm in GMT which corresponds to 8am-11am in PDT
GMT to SGT call time
Best time for a conference call or a meeting is between 8am-10am in GMT which corresponds to 4pm-6pm in SGT
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
12:30 pm12:30 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
8:30 am08:30 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
5:30 am05:30 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
8:30 pm20:30 Singapore Time (SGT). Offset UTC +8:00 hours
6:00 pm18:00 India Standard Time (IST). Offset UTC +5:30 hours
12:30 pm12:30 GMT / 8:30 am08:30 EDT / 5:30 am05:30 PDT / 8:30 pm20:30 SGT / 6:00 pm18:00 IST
| GMT | EDT | PDT | SGT | IST |
|---|---|---|---|---|
| 12am (midnight) | 8pm | 5pm | 8am | 5:30 am |
| 1am | 9pm | 6pm | 9am | 6:30 am |
| 2am | 10pm | 7pm | 10am | 7:30 am |
| 3am | 11pm | 8pm | 11am | 8:30 am |
| 4am | 12am (midnight) | 9pm | 12pm (noon) | 9:30 am |
| 5am | 1am | 10pm | 1pm | 10:30 am |
| 6am | 2am | 11pm | 2pm | 11:30 am |
| 7am | 3am | 12am (midnight) | 3pm | 12:30 pm |
| 8am | 4am | 1am | 4pm | 1:30 pm |
| 9am | 5am | 2am | 5pm | 2:30 pm |
| 10am | 6am | 3am | 6pm | 3:30 pm |
| 11am | 7am | 4am | 7pm | 4:30 pm |
| 12pm (noon) | 8am | 5am | 8pm | 5:30 pm |
| 1pm | 9am | 6am | 9pm | 6:30 pm |
| 2pm | 10am | 7am | 10pm | 7:30 pm |
| 3pm | 11am | 8am | 11pm | 8:30 pm |
| 4pm | 12pm (noon) | 9am | 12am (midnight) | 9:30 pm |
| 5pm | 1pm | 10am | 1am | 10:30 pm |
| 6pm | 2pm | 11am | 2am | 11:30 pm |
| 7pm | 3pm | 12pm (noon) | 3am | 12:30 am |
| 8pm | 4pm | 1pm | 4am | 1:30 am |
| 9pm | 5pm | 2pm | 5am | 2:30 am |
| 10pm | 6pm | 3pm | 6am | 3:30 am |
| 11pm | 7pm | 4pm | 7am | 4:30 am |
| 0:00 | 20:00 | 17:00 | 8:00 | 5:30 |
| 1:00 | 21:00 | 18:00 | 9:00 | 6:30 |
| 2:00 | 22:00 | 19:00 | 10:00 | 7:30 |
| 3:00 | 23:00 | 20:00 | 11:00 | 8:30 |
| 4:00 | 0:00 | 21:00 | 12:00 | 9:30 |
| 5:00 | 1:00 | 22:00 | 13:00 | 10:30 |
| 6:00 | 2:00 | 23:00 | 14:00 | 11:30 |
| 7:00 | 3:00 | 0:00 | 15:00 | 12:30 |
| 8:00 | 4:00 | 1:00 | 16:00 | 13:30 |
| 9:00 | 5:00 | 2:00 | 17:00 | 14:30 |
| 10:00 | 6:00 | 3:00 | 18:00 | 15:30 |
| 11:00 | 7:00 | 4:00 | 19:00 | 16:30 |
| 12:00 | 8:00 | 5:00 | 20:00 | 17:30 |
| 13:00 | 9:00 | 6:00 | 21:00 | 18:30 |
| 14:00 | 10:00 | 7:00 | 22:00 | 19:30 |
| 15:00 | 11:00 | 8:00 | 23:00 | 20:30 |
| 16:00 | 12:00 | 9:00 | 0:00 | 21:30 |
| 17:00 | 13:00 | 10:00 | 1:00 | 22:30 |
| 18:00 | 14:00 | 11:00 | 2:00 | 23:30 |
| 19:00 | 15:00 | 12:00 | 3:00 | 0:30 |
| 20:00 | 16:00 | 13:00 | 4:00 | 1:30 |
| 21:00 | 17:00 | 14:00 | 5:00 | 2:30 |
| 22:00 | 18:00 | 15:00 | 6:00 | 3:30 |
| 23:00 | 19:00 | 16:00 | 7:00 | 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
- 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 zero hour and zero minutes time differences of the zero meridian.
- 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
- Greenwich Mean Time - UTC +0
- GMT+03:00 - UTC +3
- GMT - UTC +1
- GMT+11:00 - UTC +11
- GMT-01:00 - UTC -1
- 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
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 9, 2025 at 2:00 am local time and clocks were set one hour forward to Sunday, March 9, 2025, 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 2, 2025 at 2:00 am local time and clocks are set one hour back to Sunday, November 2, 2025, 1:00 am. Standard time starts annually the on first Sunday of November.
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 five hour and zero minutes time differences 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
Pacific Daylight Time
Offset: PDT is 7 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 PDT 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: HAP - Heure Avancée du Pacifique
Spanish: PT - Zona Noroeste
Daylight Saving: Pacific Daylight Time (PDT) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Pacific Standard Time (PST).
Start: Pacific Daylight Time (PDT) started on Sunday, March 9, 2025 at 2:00 am local time and clocks were set one hour forward to Sunday, March 9, 2025, 3:00 am. Daylight saving starts annually the on second Sunday of March
End: Pacific Daylight Time (PDT) ends on Sunday, November 2, 2025 at 2:00 am local time and clocks are set one hour back to Sunday, November 2, 2025, 1:00 am local standard time instead. Daylight saving ends annually the on first Sunday of November
PDT representations, usage and related time zones
- -07 - basic short
- -0700 - basic
- -07:00 - extended
- -0700 - sign character (-) followed by a four digit time providing hours (07) and minutes (00) of the offset. Indicates seven hour and zero minutes time differences to the west of the zero meridian.
- Tango - Military abbreviation for PDT
- T - short form of 'Tango'
- America/Ensenada
- America/Los_Angeles
- America/Santa_Isabel
- America/Tijuana
- America/Vancouver
- Canada/Pacific
- Mexico/BajaNorte
- PST8PDT
- US/Pacific
- MST - Mountain Standard Time
- PDT - Pacific Daylight Time
- YST - Yukon Standard Time
- T - Tango Time Zone
Singapore Time
Offset: SGT is 8 hours ahead Greenwich Mean Time (GMT) and is used in Asia
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 eight hour and zero minutes time differences to the east of the zero meridian.
- Hotel - Military abbreviation for SGT
- H - short form of 'Hotel'
- Singapore Time - UTC +8
- South Georgia Time - UTC -2
- 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
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
- +0530 - basic
- +05:30 - extended
- +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.
- Asia/Calcutta
- Asia/Kolkata
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2
- Iran Standard Time - UTC +3:30