PST to MST to CST to EST to GMT to CET to GST Time Converter

PST
Pacific Standard Time
UTC−8
Thu, Dec 7
12am
3am
6am
9am
12pm
3pm
6pm
9pm
MST
Mountain Standard Time
UTC−7
Thu, Dec 7
1h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CST
Central Standard Time
UTC−6
Thu, Dec 7
2h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
EST
Eastern Standard Time
UTC−5
Thu, Dec 7
3h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
GMT
Greenwich Mean Time
UTC+0
Fri, Dec 8 (next day)
8h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CET
Central European Time
UTC+1
Fri, Dec 8 (next day)
9h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
GST
Gulf Standard Time
UTC+4
Fri, Dec 8 (next day)
12h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

5:00 pm17:00 PST (UTC-8), Dec 7, 2023 = 6:00 pm18:00 MST (UTC-7), Dec 7, 2023 = 7:00 pm19:00 CST (UTC-6), Dec 7, 2023 = 8:00 pm20:00 EST (UTC-5), Dec 7, 2023 = 1:00 am01:00 GMT (UTC+0), Dec 8, 2023 = 2:00 am02:00 CET (UTC+1), Dec 8, 2023 = 5:00 am05:00 GST (UTC+4), Dec 8, 2023

PST is 1 hour behind MST. PST is 2 hours behind CST. PST is 3 hours behind EST. PST is 8 hours behind GMT. PST is 9 hours behind CET. PST is 12 hours behind GST.

How the time difference changes

PST to MST

For most of the year, PDT is 1 hour behind MDT. From Nov 1, 2026 to Mar 14, 2027, PST is 1 hour behind MST. Briefly around clock changes, PDT and MST have the same time or PST is 2 hours behind MDT.

For most of the year, working hours of 9:00 am to 6:00 pm in PDT correspond to 10:00 am to 7:00 pm in MDT. At other times of the year, working hours of 9:00 am to 6:00 pm in PST correspond to 10:00 am to 7:00 pm in MST.For most of the year, working hours of 09:00 to 18:00 in PDT correspond to 10:00 to 19:00 in MDT. At other times of the year, working hours of 09:00 to 18:00 in PST correspond to 10:00 to 19:00 in MST.

PST to CST

For most of the year, PDT is 2 hours behind CDT. From Nov 1, 2026 to Mar 14, 2027, PST is 2 hours behind CST. Briefly around clock changes, PDT is 1 hour behind CST or PST is 3 hours behind CDT.

For most of the year, working hours of 9:00 am to 6:00 pm in PDT correspond to 11:00 am to 8:00 pm in CDT. At other times of the year, working hours of 9:00 am to 6:00 pm in PST correspond to 11:00 am to 8:00 pm in CST.For most of the year, working hours of 09:00 to 18:00 in PDT correspond to 11:00 to 20:00 in CDT. At other times of the year, working hours of 09:00 to 18:00 in PST correspond to 11:00 to 20:00 in CST.

PST to EST

For most of the year, PDT is 3 hours behind EDT. From Nov 1, 2026 to Mar 14, 2027, PST is 3 hours behind EST. Briefly around clock changes, PDT is 2 hours behind EST or PST is 4 hours behind EDT.

For most of the year, working hours of 9:00 am to 6:00 pm in PDT correspond to 12:00 pm to 9:00 pm in EDT. At other times of the year, working hours of 9:00 am to 6:00 pm in PST correspond to 12:00 pm to 9:00 pm in EST.For most of the year, working hours of 09:00 to 18:00 in PDT correspond to 12:00 to 21:00 in EDT. At other times of the year, working hours of 09:00 to 18:00 in PST correspond to 12:00 to 21:00 in EST.

PST to GMT

For most of the year, PDT is 7 hours behind GMT. From Nov 1, 2026 to Mar 14, 2027, PST is 8 hours behind GMT.

For most of the year, working hours of 9:00 am to 6:00 pm in PDT correspond to 4:00 pm to 1:00 am (next day) in GMT. At other times of the year, working hours of 9:00 am to 6:00 pm in PST correspond to 5:00 pm to 2:00 am (next day) in GMT.For most of the year, working hours of 09:00 to 18:00 in PDT correspond to 16:00 to 01:00 (next day) in GMT. At other times of the year, working hours of 09:00 to 18:00 in PST correspond to 17:00 to 02:00 (next day) in GMT.

PST to CET

For most of the year, PDT is 9 hours behind CEST. From Oct 25 to Nov 1, 2026, and from Mar 14 to Mar 28, 2027, PDT is 8 hours behind CET. From Nov 1, 2026 to Mar 14, 2027, PST is 9 hours behind CET.

For most of the year, working hours of 9:00 am to 6:00 pm in PDT correspond to 6:00 pm to 3:00 am (next day) in CEST. At other times of the year, working hours of 9:00 am to 6:00 pm in PST correspond to 6:00 pm to 3:00 am (next day) in CET or working hours of 9:00 am to 6:00 pm in PDT correspond to 5:00 pm to 2:00 am (next day) in CET.For most of the year, working hours of 09:00 to 18:00 in PDT correspond to 18:00 to 03:00 (next day) in CEST. At other times of the year, working hours of 09:00 to 18:00 in PST correspond to 18:00 to 03:00 (next day) in CET or working hours of 09:00 to 18:00 in PDT correspond to 17:00 to 02:00 (next day) in CET.

PST to GST

For most of the year, PDT is 11 hours behind GST. From Nov 1, 2026 to Mar 14, 2027, PST is 12 hours behind GST.

For most of the year, working hours of 9:00 am to 6:00 pm in PDT correspond to 8:00 pm to 5:00 am (next day) in GST. At other times of the year, working hours of 9:00 am to 6:00 pm in PST correspond to 9:00 pm to 6:00 am (next day) in GST.For most of the year, working hours of 09:00 to 18:00 in PDT correspond to 20:00 to 05:00 (next day) in GST. At other times of the year, working hours of 09:00 to 18:00 in PST correspond to 21:00 to 06:00 (next day) in GST.

Compare PST time with MST, CST, EST, GMT, CET, and GST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Pacific Standard Time is 1 hour behind Mountain Standard Time. Pacific Standard Time is 2 hours behind Central Standard Time. Pacific Standard Time is 3 hours behind Eastern Standard Time. Pacific Standard Time is 8 hours behind Greenwich Mean Time. Pacific Standard Time is 9 hours behind Central European Time. Pacific Standard Time is 12 hours behind Gulf Standard Time.
5:00 pm17:00 in PST is 6:00 pm18:00 in MST and is 7:00 pm19:00 in CST and is 8:00 pm20:00 in EST and is 1:00 am01:00 in GMT and is 2:00 am02:00 in CET and is 5:00 am05:00 in GST

PST to MST call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in PST which corresponds to 10am-6pm10:00-18:00 in MST
PST to CST call time
Best time for a conference call or a meeting is between 9am-4pm09:00-16:00 in PST which corresponds to 11am-6pm11:00-18:00 in CST
PST to EST call time
Best time for a conference call or a meeting is between 9am-3pm09:00-15:00 in PST which corresponds to 12pm-6pm12:00-18:00 in EST
PST to GMT call time
Best time for a conference call or a meeting is between 9am-10am09:00-10:00 in PST which corresponds to 5pm-6pm17:00-18:00 in GMT
PST to CET call time
Best time for a conference call or a meeting is between 8:30am-9:30am08:30-09:30 in PST which corresponds to 5:30pm-6:30pm17:30-18:30 in CET. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
PST to GST call time
Best time for a conference call or a meeting is between 7am-8am07:00-08:00 in PST which corresponds to 7pm-8pm19:00-20:00 in GST. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.

5:00 pm17:00 Pacific Standard Time (PST). Offset UTC -8:00 hours
6:00 pm18:00 Mountain Standard Time (MST). Offset UTC -7:00 hours
7:00 pm19:00 Central Standard Time (CST). Offset UTC -6:00 hours
8:00 pm20:00 Eastern Standard Time (EST). Offset UTC -5:00 hours
1:00 am01:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
2:00 am02:00 Central European Time (CET). Offset UTC +1:00 hour
5:00 am05:00 Gulf Standard Time (GST). Offset UTC +4:00 hours

5:00 pm17:00 PST / 6:00 pm18:00 MST / 7:00 pm19:00 CST / 8:00 pm20:00 EST / 1:00 am01:00 GMT / 2:00 am02:00 CET / 5:00 am05:00 GST

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.

Hourly time comparison
PSTMSTCSTESTGMTCETGST
1:00am2:00am3:00am8:00am9:00am12:00pm
2:00am3:00am4:00am9:00am10:00am1:00pm
3:00am4:00am5:00am10:00am11:00am2:00pm
4:00am5:00am6:00am11:00am12:00pm3:00pm
5:00am6:00am7:00am12:00pm1:00pm4:00pm
6:00am7:00am8:00am1:00pm2:00pm5:00pm
7:00am8:00am9:00am2:00pm3:00pm6:00pm
8:00am9:00am10:00am3:00pm4:00pm7:00pm
9:00am10:00am11:00am4:00pm5:00pm8:00pm
10:00am11:00am12:00pm5:00pm6:00pm9:00pm
11:00am12:00pm1:00pm6:00pm7:00pm10:00pm
12:00pm1:00pm2:00pm7:00pm8:00pm11:00pm
1:00pm2:00pm3:00pm8:00pm9:00pm12:00am next day
2:00pm3:00pm4:00pm9:00pm10:00pm1:00am next day
3:00pm4:00pm5:00pm10:00pm11:00pm2:00am next day
4:00pm5:00pm6:00pm11:00pm12:00am next day3:00am next day
5:00pm6:00pm7:00pm12:00am next day1:00am next day4:00am next day
6:00pm7:00pm8:00pm1:00am next day2:00am next day5:00am next day
7:00pm8:00pm9:00pm2:00am next day3:00am next day6:00am next day
8:00pm9:00pm10:00pm3:00am next day4:00am next day7:00am next day
9:00pm10:00pm11:00pm4:00am next day5:00am next day8:00am next day
10:00pm11:00pm12:00am next day5:00am next day6:00am next day9:00am next day
11:00pm12:00am next day1:00am next day6:00am next day7:00am next day10:00am next day
12:00am next day1:00am next day2:00am next day7:00am next day8:00am next day11:00am next day
01:0002:0003:0008:0009:0012:00
02:0003:0004:0009:0010:0013:00
03:0004:0005:0010:0011:0014:00
04:0005:0006:0011:0012:0015:00
05:0006:0007:0012:0013:0016:00
06:0007:0008:0013:0014:0017:00
07:0008:0009:0014:0015:0018:00
08:0009:0010:0015:0016:0019:00
09:0010:0011:0016:0017:0020:00
10:0011:0012:0017:0018:0021:00
11:0012:0013:0018:0019:0022:00
12:0013:0014:0019:0020:0023:00
13:0014:0015:0020:0021:0000:00 next day
14:0015:0016:0021:0022:0001:00 next day
15:0016:0017:0022:0023:0002:00 next day
16:0017:0018:0023:0000:00 next day03:00 next day
17:0018:0019:0000:00 next day01:00 next day04:00 next day
18:0019:0020:0001:00 next day02:00 next day05:00 next day
19:0020:0021:0002:00 next day03:00 next day06:00 next day
20:0021:0022:0003:00 next day04:00 next day07:00 next day
21:0022:0023:0004:00 next day05:00 next day08:00 next day
22:0023:0000:00 next day05:00 next day06:00 next day09:00 next day
23:0000:00 next day01:00 next day06:00 next day07:00 next day10:00 next day
00:00 next day01:00 next day02:00 next day07:00 next day08:00 next day11:00 next day

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

Map of the areas on Pacific Standard Time (PST)
PST part of the year

On December 7, 2023 all shaded areas are on PST.

Open the world time zone map© OpenStreetMap

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).

123456789101112Start: Pacific Standard Time (PST) started on Sunday, November 5, 2023 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 5, 2023, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

123456789101112End: Pacific Standard Time (PST) ends on Sunday, March 10, 2024 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 10, 2024, 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

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 an offset of eight hours 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
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

Mountain Standard Time

Offset: MST is 7 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Canada, Mexico, United States

Principal Cities: The largest city in the MST time zone is Phoenix in the United States, with about 1.65 million people. Other major cities in this time zone include Ciudad Juárez, Hermosillo, Culiacán, Denver.

French: HNR - Heure Normale des Rocheuses

Spanish: MT - Zona Pacífico

Map of the areas on Mountain Standard Time (MST)
MST all year MST part of the year

On December 7, 2023 some shaded areas are on UTC−8 (Pacific Standard Time).

Open the world time zone map© OpenStreetMap

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Mountain Daylight Time (MDT).

123456789101112Start: Mountain Standard Time (MST) started on Sunday, November 5, 2023 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 5, 2023, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

123456789101112End: Mountain Standard Time (MST) ends on Sunday, March 10, 2024 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 10, 2024, 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.

MST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -07 - basic short
  • -0700 - basic
  • -07:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -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.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Tango - Military abbreviation for MST
  • T - short form of 'Tango'
IANA/Olson: Reflects MST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Boise
  • America/Cambridge_Bay
  • America/Ciudad_Juarez
  • America/Creston
  • America/Dawson
  • America/Dawson_Creek
  • America/Denver
  • America/Edmonton
  • America/Fort_Nelson
  • America/Hermosillo
  • America/Inuvik
  • America/Mazatlan
  • America/Phoenix
  • America/Shiprock
  • America/Whitehorse
  • America/Yellowknife
  • Canada/Mountain
  • Canada/Yukon
  • MST
  • MST7MDT
  • Mexico/BajaSur
  • Navajo
  • US/Arizona
  • US/Mountain
Time zones with the GMT -7 offset:
  • MST - Mountain Standard Time
  • PDT - Pacific Daylight Time
  • YST - Yukon Standard Time
  • T - Tango 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

Map of the areas on Central Standard Time (CST)
CST all year CST part of the year

On December 7, 2023 some shaded areas are on UTC−7 (MST).

Open the world time zone map© OpenStreetMap

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).

123456789101112Start: Central Standard Time (CST) started on Sunday, November 5, 2023 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 5, 2023, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

123456789101112End: Central Standard Time (CST) ends on Sunday, March 10, 2024 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 10, 2024, 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

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -06 - basic short
  • -0600 - basic
  • -06:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -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.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Sierra - Military abbreviation for CST
  • S - short form of 'Sierra'
IANA/Olson: Reflects CST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • 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
CST Abbreviation: Several time zones share CST abbreviation and it could refer to these time zones
  • Central Standard Time - UTC -6
  • China Standard Time - UTC +8
  • Cuba Standard Time - UTC -5
Time zones with the GMT -6 offset:
  • CST - Central Standard Time
  • CT - Central Time
  • MDT - Mountain Daylight Time
  • EAST - Easter Island Standard Time
  • GALT - Galapagos Time
  • S - Sierra 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

Map of the areas on Eastern Standard Time (EST)
EST all year EST part of the year

On December 7, 2023 some shaded areas are on UTC−6 (Central Standard Time).

Open the world time zone map© OpenStreetMap

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).

123456789101112Start: Eastern Standard Time (EST) started on Sunday, November 5, 2023 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 5, 2023, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

123456789101112End: Eastern Standard Time (EST) ends on Sunday, March 10, 2024 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 10, 2024, 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

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 an offset of five hours 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

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.

Map of the areas on Greenwich Mean Time (GMT)
GMT all year GMT part of the year

On December 7, 2023 some shaded areas are on UTC+1.

Open the world time zone map© OpenStreetMap

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 the zero UTC/GMT offset.
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
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 - Coordinated Universal Time
  • WT - Western Sahara Standard Time
  • Z - Zulu Time Zone

Central European Time

Offset: CET is 1 hour ahead of Greenwich Mean Time (GMT).

Countries using this time zone: Albania, Algeria, Andorra, Austria, Belgium, Bosnia and Herzegovina, Croatia, Czechia, Denmark, France, Germany, Gibraltar, Hungary, Italy, Kosovo, Liechtenstein, Luxembourg, Malta, Monaco, Montenegro, Netherlands, North Macedonia, Norway, Poland, San Marino, Serbia, Slovakia, Slovenia, Spain, Svalbard and Jan Mayen, Sweden, Switzerland, Tunisia, Vatican City

Principal Cities: The largest city in the CET time zone is Berlin in Germany, with about 3.426 million people. Other major cities in this time zone include Madrid, Algiers, Rome, Paris.

German: MEZ - Mitteleuropäische Zeit

Map of the areas on Central European Time (CET)
CET all year CET part of the year

On December 7, 2023 all shaded areas are on CET.

Open the world time zone map© OpenStreetMap

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Central European Summer Time (CEST).

123456789101112Start: Central European Time (CET) started on Sunday, October 29, 2023 at 3:00 am03:00 local time and clocks were set one hour back to Sunday, October 29, 2023, 2:00 am02:00. Standard time starts annually on the last Sunday of October.

123456789101112End: Central European Time (CET) ends on Sunday, March 31, 2024 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 31, 2024, 3:00 am03:00 local daylight time instead. Standard time ends annually on the last Sunday of March.

See upcoming clock changes worldwide.

CET representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +01 - basic short
  • +0100 - basic
  • +01:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +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.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Alpha - Military abbreviation for CET
  • A - short form of 'Alpha'
IANA/Olson: Reflects CET time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Africa/Algiers
  • Africa/Ceuta
  • Africa/Tunis
  • 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
  • MET
  • Poland
Time zones with the GMT +1 offset:
  • 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

Gulf Standard Time

Offset: GST is 4 hours ahead of Greenwich Mean Time (GMT).

Countries using this time zone: Oman, United Arab Emirates

Principal Cities: The largest city in the GST time zone is Dubai in the United Arab Emirates, with about 3.79 million people. Other major cities in this time zone include Abu Dhabi, Sharjah, Al Ain City, Muscat.

Daylight Saving: Clocks in Gulf Standard Time (GST) do not change for daylight saving time, so GST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

Map of the areas on Gulf Standard Time (GST)
GST all year

Open the world time zone map© OpenStreetMap

GST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +04 - basic short
  • +0400 - basic
  • +04:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +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 east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Delta - Military abbreviation for GST
  • D - short form of 'Delta'
Time zones with the GMT +4 offset:
  • KUYT - Kuybyshev Time
  • MSD - Moscow Daylight Time
  • SAMT - Samara Time
  • AMT - Armenia Time
  • AZT - Azerbaijan Time
  • D - Delta Time Zone
  • GET - Georgia Standard Time
  • GST - Gulf Standard Time
  • MUT - Mauritius Time
  • RET - Reunion Time
  • SCT - Seychelles Time
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT