PDT to ADT to EDT to GMT
Time Difference
Pacific Daylight Time is 4 hours behind Atlantic Daylight Time and 3 hours behind Eastern Daylight Time and 7 hours behind Greenwich Mean Time
5:30 am05:30 in PDT is 9:30 am09:30 in ADT and is 8:30 am08:30 in EDT and is 12:30 pm12:30 in GMT
PDT to ADT call time
Best time for a conference call or a meeting is between 8am-2pm in PDT which corresponds to 12pm-6pm in ADT
PDT to EDT call time
Best time for a conference call or a meeting is between 8am-3pm in PDT which corresponds to 11am-6pm in EDT
PDT to GMT call time
Best time for a conference call or a meeting is between 8am-11am in PDT which corresponds to 3pm-6pm in GMT
5:30 am05:30 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
9:30 am09:30 Atlantic Daylight Time (ADT). Offset UTC -3:00 hours
8:30 am08:30 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
12:30 pm12:30 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
5:30 am05:30 PDT / 9:30 am09:30 ADT / 8:30 am08:30 EDT / 12:30 pm12:30 GMT
| PDT | ADT | EDT | GMT |
|---|---|---|---|
| 12am (midnight) | 4am | 3am | 7am |
| 1am | 5am | 4am | 8am |
| 2am | 6am | 5am | 9am |
| 3am | 7am | 6am | 10am |
| 4am | 8am | 7am | 11am |
| 5am | 9am | 8am | 12pm (noon) |
| 6am | 10am | 9am | 1pm |
| 7am | 11am | 10am | 2pm |
| 8am | 12pm (noon) | 11am | 3pm |
| 9am | 1pm | 12pm (noon) | 4pm |
| 10am | 2pm | 1pm | 5pm |
| 11am | 3pm | 2pm | 6pm |
| 12pm (noon) | 4pm | 3pm | 7pm |
| 1pm | 5pm | 4pm | 8pm |
| 2pm | 6pm | 5pm | 9pm |
| 3pm | 7pm | 6pm | 10pm |
| 4pm | 8pm | 7pm | 11pm |
| 5pm | 9pm | 8pm | 12am (midnight) |
| 6pm | 10pm | 9pm | 1am |
| 7pm | 11pm | 10pm | 2am |
| 8pm | 12am (midnight) | 11pm | 3am |
| 9pm | 1am | 12am (midnight) | 4am |
| 10pm | 2am | 1am | 5am |
| 11pm | 3am | 2am | 6am |
| 0:00 | 4:00 | 3:00 | 7:00 |
| 1:00 | 5:00 | 4:00 | 8:00 |
| 2:00 | 6:00 | 5:00 | 9:00 |
| 3:00 | 7:00 | 6:00 | 10:00 |
| 4:00 | 8:00 | 7:00 | 11:00 |
| 5:00 | 9:00 | 8:00 | 12:00 |
| 6:00 | 10:00 | 9:00 | 13:00 |
| 7:00 | 11:00 | 10:00 | 14:00 |
| 8:00 | 12:00 | 11:00 | 15:00 |
| 9:00 | 13:00 | 12:00 | 16:00 |
| 10:00 | 14:00 | 13:00 | 17:00 |
| 11:00 | 15:00 | 14:00 | 18:00 |
| 12:00 | 16:00 | 15:00 | 19:00 |
| 13:00 | 17:00 | 16:00 | 20:00 |
| 14:00 | 18:00 | 17:00 | 21:00 |
| 15:00 | 19:00 | 18:00 | 22:00 |
| 16:00 | 20:00 | 19:00 | 23:00 |
| 17:00 | 21:00 | 20:00 | 0:00 |
| 18:00 | 22:00 | 21:00 | 1:00 |
| 19:00 | 23:00 | 22:00 | 2:00 |
| 20:00 | 0:00 | 23:00 | 3:00 |
| 21:00 | 1:00 | 0:00 | 4:00 |
| 22:00 | 2:00 | 1:00 | 5:00 |
| 23:00 | 3:00 | 2:00 | 6:00 |
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
Atlantic Daylight Time
Offset: ADT is 3 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries: It is used in following countries: Bermuda, Canada, Greenland
Principal Cities: The largest city in the ADT timezone is Halifax from Canada with population about 359,111 people. Other major cities in the area are Sydney, Dartmouth, Saint John, Moncton
French: HAA - Heure Avancée de l'Atlantique
Daylight Saving: Atlantic Daylight Time (ADT) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Atlantic Standard Time (AST).
Start: Atlantic Daylight Time (ADT) 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: Atlantic Daylight Time (ADT) 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
ADT representations, usage and related time zones
- -03 - basic short
- -0300 - basic
- -03:00 - extended
- -0300 - sign character (-) followed by a four digit time providing hours (03) and minutes (00) of the offset. Indicates three hour and zero minutes time differences to the west of the zero meridian.
- Papa - Military abbreviation for ADT
- P - short form of 'Papa'
- America/Glace_Bay
- America/Goose_Bay
- America/Halifax
- America/Moncton
- America/Thule
- Atlantic/Bermuda
- Canada/Atlantic
- ADT - Atlantic Daylight Time
- PMT - Pierre & Miquelon Standard Time
- PMST - Pierre & Miquelon Standard Time
- WGT - West Greenland Time
- AMST - Amazon Summer Time
- ART - Argentina Time
- BRT - BrasÃlia time
- CLST - Chile Summer Time
- FKST - Falkland Islands Summer Time
- GFT - French Guiana Time
- P - Papa Time Zone
- PYST - Paraguay Summer Time
- SRT - Suriname Time
- UYT - Uruguay Time
Eastern Daylight Time
Offset: EDT is 4 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries: It is used in following countries: Bahamas, Canada, Haiti, Turks & Caicos Is, United States
Principal Cities: The largest city in the EDT 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: HAE - Heure Avancée de l'Est
Spanish: EDT - Tiempo de verano del Este, ET - Zona Sureste
Daylight Saving: Eastern Daylight Time (EDT) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Eastern Standard Time (EST).
Start: Eastern Daylight Time (EDT) 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: Eastern Daylight Time (EDT) 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
EDT representations, usage and related time zones
- -04 - basic short
- -0400 - basic
- -04:00 - extended
- -0400 - sign character (-) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates four hour and zero minutes time differences to the west of the zero meridian.
- Quebec - Military abbreviation for EDT
- Q - short form of 'Quebec'
- 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/Kentucky/Louisville
- America/Kentucky/Monticello
- America/Louisville
- America/Montreal
- America/Nassau
- America/New_York
- America/Nipigon
- America/Pangnirtung
- America/Port-au-Prince
- America/Thunder_Bay
- America/Toronto
- Canada/Eastern
- EST5EDT
- US/East-Indiana
- US/Eastern
- US/Michigan
- AST - Atlantic Standard Time
- EDT - Eastern Daylight Time
- AMT - Amazon Time
- BOT - Bolivia Time
- CDT - Cuba Daylight Time
- CLT - Chile Standard Time
- FKT - Falkland Island Time
- GYT - Guyana Time
- HLV - Hora Legal de Venezuela
- PYT - Paraguay Time
- Q - Quebec Time Zone
- VET - Venezuelan Standard Time
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-01:00 - UTC -1
- GMT+11:00 - UTC +11
- 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