GMT to EDT to CDT to MDT to PDT Time Converter
The United Kingdom is on summer time: BST (UTC+1) until Sun, Oct 25.
Iceland and Ghana stay on GMT (UTC+0).
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12:00 pm12:00 GMT (UTC+0), Oct 12, 2026 = 8:00 am08:00 EDT (UTC-4), Oct 12, 2026 = 7:00 am07:00 CDT (UTC-5), Oct 12, 2026 = 6:00 am06:00 MDT (UTC-6), Oct 12, 2026 = 5:00 am05:00 PDT (UTC-7), Oct 12, 2026
GMT is 4 hours ahead of EDT. GMT is 5 hours ahead of CDT. GMT is 6 hours ahead of MDT. GMT is 7 hours ahead of PDT.
How the time difference changes
GMT to EDT
For most of the year, GMT is 4 hours ahead of EDT. From Nov 1, 2026 to Mar 14, 2027, GMT is 5 hours ahead of EST.
For most of the year, working hours of 9:00 am to 5:00 pm in GMT correspond to 5:00 am to 1:00 pm in EDT. At other times of the year, working hours of 9:00 am to 5:00 pm in GMT correspond to 4:00 am to 12:00 pm in EST.For most of the year, working hours of 09:00 to 17:00 in GMT correspond to 05:00 to 13:00 in EDT. At other times of the year, working hours of 09:00 to 17:00 in GMT correspond to 04:00 to 12:00 in EST.
GMT to CDT
For most of the year, GMT is 5 hours ahead of CDT. From Nov 1, 2026 to Mar 14, 2027, GMT is 6 hours ahead of CST.
For most of the year, working hours of 9:00 am to 5:00 pm in GMT correspond to 4:00 am to 12:00 pm in CDT. At other times of the year, working hours of 9:00 am to 5:00 pm in GMT correspond to 3:00 am to 11:00 am in CST.For most of the year, working hours of 09:00 to 17:00 in GMT correspond to 04:00 to 12:00 in CDT. At other times of the year, working hours of 09:00 to 17:00 in GMT correspond to 03:00 to 11:00 in CST.
GMT to MDT
For most of the year, GMT is 6 hours ahead of MDT. From Nov 1, 2026 to Mar 14, 2027, GMT is 7 hours ahead of MST.
For most of the year, working hours of 9:00 am to 5:00 pm in GMT correspond to 3:00 am to 11:00 am in MDT. At other times of the year, working hours of 9:00 am to 5:00 pm in GMT correspond to 2:00 am to 10:00 am in MST.For most of the year, working hours of 09:00 to 17:00 in GMT correspond to 03:00 to 11:00 in MDT. At other times of the year, working hours of 09:00 to 17:00 in GMT correspond to 02:00 to 10:00 in MST.
GMT to PDT
For most of the year, GMT is 7 hours ahead of PDT. From Nov 1, 2026 to Mar 14, 2027, GMT is 8 hours ahead of PST.
For most of the year, working hours of 9:00 am to 5:00 pm in GMT correspond to 2:00 am to 10:00 am in PDT. At other times of the year, working hours of 9:00 am to 5:00 pm in GMT correspond to 1:00 am to 9:00 am in PST.For most of the year, working hours of 09:00 to 17:00 in GMT correspond to 02:00 to 10:00 in PDT. At other times of the year, working hours of 09:00 to 17:00 in GMT correspond to 01:00 to 09:00 in PST.
Compare GMT time with EDT, CDT, MDT, and PDT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Greenwich Mean Time is 4 hours ahead of Eastern Daylight Time. Greenwich Mean Time is 5 hours ahead of Central Daylight Time. Greenwich Mean Time is 6 hours ahead of Mountain Daylight Time. Greenwich Mean Time is 7 hours ahead of Pacific Daylight Time.
12:00 pm12:00 in GMT is 8:00 am08:00 in EDT and is 7:00 am07:00 in CDT and is 6:00 am06:00 in MDT and is 5:00 am05:00 in PDT
GMT to EDT call time
Best time for a conference call or a meeting is between 1pm-5pm13:00-17:00 in GMT which corresponds to 9am-1pm09:00-13:00 in EDT
GMT to CDT call time
Best time for a conference call or a meeting is between 2pm-5pm14:00-17:00 in GMT which corresponds to 9am-12pm09:00-12:00 in CDT
GMT to MDT call time
Best time for a conference call or a meeting is between 3pm-5pm15:00-17:00 in GMT which corresponds to 9am-11am09:00-11:00 in MDT
GMT to PDT call time
Best time for a conference call or a meeting is between 4pm-5pm16:00-17:00 in GMT which corresponds to 9am-10am09:00-10:00 in PDT
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
8:00 am08:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
7:00 am07:00 Central Daylight Time (CDT). Offset UTC -5:00 hours
6:00 am06:00 Mountain Daylight Time (MDT). Offset UTC -6:00 hours
5:00 am05:00 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
12:00 pm12:00 GMT / 8:00 am08:00 EDT / 7:00 am07:00 CDT / 6:00 am06:00 MDT / 5:00 am05:00 PDT
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 | EDT | CDT | MDT | PDT |
|---|---|---|---|---|
| 8:00pm previous day | 7:00pm previous day | 6:00pm previous day | 5:00pm previous day | |
| 9:00pm previous day | 8:00pm previous day | 7:00pm previous day | 6:00pm previous day | |
| 10:00pm previous day | 9:00pm previous day | 8:00pm previous day | 7:00pm previous day | |
| 11:00pm previous day | 10:00pm previous day | 9:00pm previous day | 8:00pm previous day | |
| 12:00am | 11:00pm previous day | 10:00pm previous day | 9:00pm previous day | |
| 1:00am | 12:00am | 11:00pm previous day | 10:00pm previous day | |
| 2:00am | 1:00am | 12:00am | 11:00pm previous day | |
| 3:00am | 2:00am | 1:00am | 12:00am | |
| 4:00am | 3:00am | 2:00am | 1:00am | |
| 5:00am | 4:00am | 3:00am | 2:00am | |
| 6:00am | 5:00am | 4:00am | 3:00am | |
| 7:00am | 6:00am | 5:00am | 4:00am | |
| 8:00am | 7:00am | 6:00am | 5:00am | |
| 9:00am | 8:00am | 7:00am | 6:00am | |
| 10:00am | 9:00am | 8:00am | 7:00am | |
| 11:00am | 10:00am | 9:00am | 8:00am | |
| 12:00pm | 11:00am | 10:00am | 9:00am | |
| 1:00pm | 12:00pm | 11:00am | 10:00am | |
| 2:00pm | 1:00pm | 12:00pm | 11:00am | |
| 3:00pm | 2:00pm | 1:00pm | 12:00pm | |
| 4:00pm | 3:00pm | 2:00pm | 1:00pm | |
| 5:00pm | 4:00pm | 3:00pm | 2:00pm | |
| 6:00pm | 5:00pm | 4:00pm | 3:00pm | |
| 7:00pm | 6:00pm | 5:00pm | 4:00pm | |
| 20:00 previous day | 19:00 previous day | 18:00 previous day | 17:00 previous day | |
| 21:00 previous day | 20:00 previous day | 19:00 previous day | 18:00 previous day | |
| 22:00 previous day | 21:00 previous day | 20:00 previous day | 19:00 previous day | |
| 23:00 previous day | 22:00 previous day | 21:00 previous day | 20:00 previous day | |
| 00:00 | 23:00 previous day | 22:00 previous day | 21:00 previous day | |
| 01:00 | 00:00 | 23:00 previous day | 22:00 previous day | |
| 02:00 | 01:00 | 00:00 | 23:00 previous day | |
| 03:00 | 02:00 | 01:00 | 00:00 | |
| 04:00 | 03:00 | 02:00 | 01:00 | |
| 05:00 | 04:00 | 03:00 | 02:00 | |
| 06:00 | 05:00 | 04:00 | 03:00 | |
| 07:00 | 06:00 | 05:00 | 04:00 | |
| 08:00 | 07:00 | 06:00 | 05:00 | |
| 09:00 | 08:00 | 07:00 | 06:00 | |
| 10:00 | 09:00 | 08:00 | 07:00 | |
| 11:00 | 10:00 | 09:00 | 08:00 | |
| 12:00 | 11:00 | 10:00 | 09:00 | |
| 13:00 | 12:00 | 11:00 | 10:00 | |
| 14:00 | 13:00 | 12:00 | 11:00 | |
| 15:00 | 14:00 | 13:00 | 12:00 | |
| 16:00 | 15:00 | 14:00 | 13:00 | |
| 17:00 | 16:00 | 15:00 | 14:00 | |
| 18:00 | 17:00 | 16:00 | 15:00 | |
| 19:00 | 18:00 | 17:00 | 16:00 |
Greenwich Mean Time
Offset: GMT is the same as Greenwich Mean Time (GMT).
Countries using this time zone: 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 time zone is London in the United Kingdom, with about 8.962 million people. Other major cities in this time zone include Abidjan, Bamako, Dakar, Kumasi.
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 the lighter areas are on UTC+1 (British Summer Time, Irish Standard Time).
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
Eastern Daylight Time
Offset: EDT is 4 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Bahamas, Canada, Haiti, Turks & Caicos Is, United States
Principal Cities: The largest city in the EDT 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: HAE - Heure Avancée de l'Est
Spanish: EDT - Tiempo de verano del Este, ET - Zona Sureste
Today all shaded areas are on EDT.
Daylight Saving: Eastern Daylight Time (EDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Eastern Standard Time (EST).
Start: Eastern Daylight Time (EDT) started 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. Daylight saving starts annually on the second Sunday of March.
End: Eastern Daylight Time (EDT) ends 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 local standard time instead. Daylight saving ends annually on the 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 an offset of four hours 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
Central Daylight Time
Offset: CDT is 5 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Canada, Mexico, United States
Principal Cities: The largest city in the CDT time zone is Chicago in the United States, with about 2.664 million people. Other major cities in this time zone include Houston, San Antonio, Dallas, Fort Worth.
French: HAC - Heure Avancée du Centre
Spanish: CT - Zona Centro
Today all shaded areas are on CDT.
Daylight Saving: Central Daylight Time (CDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Central Standard Time (CST).
Start: Central Daylight Time (CDT) started 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. Daylight saving starts annually on the second Sunday of March.
End: Central Daylight Time (CDT) ends 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 local standard time instead. Daylight saving ends annually on the first Sunday of November.
CDT 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 CDT
- R - short form of 'Romeo'
- America/Chicago
- America/Indiana/Knox
- America/Indiana/Tell_City
- America/Knox_IN
- America/Matamoros
- America/Menominee
- America/North_Dakota/Beulah
- America/North_Dakota/Center
- America/North_Dakota/New_Salem
- America/Ojinaga
- America/Rainy_River
- America/Rankin_Inlet
- America/Resolute
- America/Winnipeg
- CST6CDT
- Canada/Central
- US/Central
- US/Indiana-Starke
- Central Daylight Time - UTC -5
- Cuba Daylight Time - UTC -4
- 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
Mountain Daylight Time
Offset: MDT is 6 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Canada, Mexico, United States
Principal Cities: The largest city in the MDT time zone is Ciudad Juárez in Mexico, with about 1.512 million people. Other major cities in this time zone include Calgary, Edmonton, Denver, El Paso.
French: HAR - Heure Avancée des Rocheuses
Spanish: MT - Zona Pacífico
Today all shaded areas are on MDT.
Daylight Saving: Mountain Daylight Time (MDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Mountain Standard Time (MST).
Start: Mountain Daylight Time (MDT) started 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. Daylight saving starts annually on the second Sunday of March.
End: Mountain Daylight Time (MDT) ends 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 local standard time instead. Daylight saving ends annually on the first Sunday of November.
MDT 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 MDT
- S - short form of 'Sierra'
- America/Boise
- America/Cambridge_Bay
- America/Ciudad_Juarez
- America/Denver
- America/Edmonton
- America/Inuvik
- America/Shiprock
- America/Yellowknife
- Canada/Mountain
- MST7MDT
- Navajo
- US/Mountain
- CST - Central Standard Time
- CT - Central Time
- MDT - Mountain Daylight Time
- EAST - Easter Island Standard Time
- GALT - Galapagos Time
- S - Sierra Time Zone
Pacific Daylight Time
Offset: PDT is 7 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Canada, Mexico, United States
Principal Cities: The largest city in the PDT 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: HAP - Heure Avancée du Pacifique
Spanish: PT - Zona Noroeste
Today all shaded areas are on PDT.
Daylight Saving: Pacific Daylight Time (PDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Pacific Standard Time (PST).
Start: Pacific Daylight Time (PDT) started 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. Daylight saving starts annually on the second Sunday of March.
End: Pacific Daylight Time (PDT) ends 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 local standard time instead. Daylight saving ends annually on the 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 an offset of seven hours 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