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PT/PDT
Pacific Time
GMT -7
12am
3am
6am
9am
12pm
3pm
6pm
9pm
MDT
Mountain Daylight Time
GMT -6
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CT/CDT
Central Time
GMT -5
12am
3am
6am
9am
12pm
3pm
6pm
9pm
ET/EDT
Eastern Time
GMT -4
12am
3am
6am
9am
12pm
3pm
6pm
9pm
GMT
Greenwich Mean Time
GMT +0
12am
3am
6am
9am
12pm
3pm
6pm
9pm
The United Kingdom is on summer time: BST (UTC+1) until Sun, Oct 25.

Iceland and Ghana stay on GMT (UTC+0).

United Kingdom
BST
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Denmark
CEST
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Turkey
TRT
12am
3am
6am
9am
12pm
3pm
6pm
9pm
IST
India Standard Time
GMT +5:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CST
China Standard Time
GMT +8
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

5:00 am05:00 PDT (UTC-7), Oct 9, 2026 = 6:00 am06:00 MDT (UTC-6), Oct 9, 2026 = 7:00 am07:00 CDT (UTC-5), Oct 9, 2026 = 8:00 am08:00 EDT (UTC-4), Oct 9, 2026 = 12:00 pm12:00 GMT (UTC+0), Oct 9, 2026 = 1:00 pm13:00 BST (UTC+1), Oct 9, 2026 = 2:00 pm14:00 CEST (UTC+2), Oct 9, 2026 = 3:00 pm15:00 TRT (UTC+3), Oct 9, 2026 = 5:30 pm17:30 IST (UTC+5:30), Oct 9, 2026 = 8:00 pm20:00 CST (UTC+8), Oct 9, 2026

PDT is 1 hour behind MDT. PDT is 2 hours behind CDT. PDT is 3 hours behind EDT. PDT is 7 hours behind GMT. PDT is 8 hours behind London. PDT is 9 hours behind Copenhagen. PDT is 10 hours behind Istanbul. PDT is 12 hours and 30 minutes behind IST. PDT is 15 hours behind CST.

How the time difference changes

PT to MDT

For most of the year, PT is 1 hour behind MDT. At other times of the year, PT is 1 hour behind MST. Briefly around clock changes, PT and MST have the same time or PT is 2 hours behind MDT.

For most of the year, working hours of 9:00 am to 5:00 pm in PT correspond to 10:00 am to 6:00 pm in MDT. At other times of the year, working hours of 9:00 am to 5:00 pm in PT correspond to 10:00 am to 6:00 pm in MST.For most of the year, working hours of 09:00 to 17:00 in PT correspond to 10:00 to 18:00 in MDT. At other times of the year, working hours of 09:00 to 17:00 in PT correspond to 10:00 to 18:00 in MST.

PT to CT

Normally, PT is 2 hours behind CT. Briefly around seasonal clock changes, PT is 1 hour behind CT or PT is 3 hours behind CT.

Typically, working hours of 9:00 am to 5:00 pm in PT correspond to 11:00 am to 7:00 pm in CT.Typically, working hours of 09:00 to 17:00 in PT correspond to 11:00 to 19:00 in CT.

PT to ET

Normally, PT is 3 hours behind ET. Briefly around seasonal clock changes, PT is 2 hours behind ET or PT is 4 hours behind ET.

Typically, working hours of 9:00 am to 5:00 pm in PT correspond to 12:00 pm to 8:00 pm in ET.Typically, working hours of 09:00 to 17:00 in PT correspond to 12:00 to 20:00 in ET.

PT to GMT

For most of the year, PT is 7 hours behind GMT. At other times of the year, PT is 8 hours behind GMT.

For most of the year, working hours of 9:00 am to 5:00 pm in PT correspond to 4:00 pm to 12:00 am (next day) in GMT. At other times of the year, working hours of 9:00 am to 5:00 pm in PT correspond to 5:00 pm to 1:00 am (next day) in GMT.For most of the year, working hours of 09:00 to 17:00 in PT correspond to 16:00 to 00:00 (next day) in GMT. At other times of the year, working hours of 09:00 to 17:00 in PT correspond to 17:00 to 01:00 (next day) in GMT.

PT to London

For most of the year, PT is 8 hours behind London. At other times of the year, PT is 7 hours behind London.

For most of the year, working hours of 9:00 am to 5:00 pm in PT correspond to 5:00 pm to 1:00 am (next day) in London. At other times of the year, working hours of 9:00 am to 5:00 pm in PT correspond to 4:00 pm to 12:00 am (next day) in London.For most of the year, working hours of 09:00 to 17:00 in PT correspond to 17:00 to 01:00 (next day) in London. At other times of the year, working hours of 09:00 to 17:00 in PT correspond to 16:00 to 00:00 (next day) in London.

PT to Copenhagen

For most of the year, PT is 9 hours behind Copenhagen. At other times of the year, PT is 8 hours behind Copenhagen.

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

PT to Istanbul

For most of the year, PT is 10 hours behind Istanbul. At other times of the year, PT is 11 hours behind Istanbul.

For most of the year, working hours of 9:00 am to 5:00 pm in PT correspond to 7:00 pm to 3:00 am (next day) in Istanbul. At other times of the year, working hours of 9:00 am to 5:00 pm in PT correspond to 8:00 pm to 4:00 am (next day) in Istanbul.For most of the year, working hours of 09:00 to 17:00 in PT correspond to 19:00 to 03:00 (next day) in Istanbul. At other times of the year, working hours of 09:00 to 17:00 in PT correspond to 20:00 to 04:00 (next day) in Istanbul.

PT to IST

For most of the year, PT is 12 hours and 30 minutes behind IST. At other times of the year, PT is 13 hours and 30 minutes behind IST.

For most of the year, working hours of 9:00 am to 5:00 pm in PT correspond to 9:30 pm to 5:30 am (next day) in IST. At other times of the year, working hours of 9:00 am to 5:00 pm in PT correspond to 10:30 pm to 6:30 am (next day) in IST.For most of the year, working hours of 09:00 to 17:00 in PT correspond to 21:30 to 05:30 (next day) in IST. At other times of the year, working hours of 09:00 to 17:00 in PT correspond to 22:30 to 06:30 (next day) in IST.

PT to CST Asia

For most of the year, PT is 15 hours behind CST Asia. At other times of the year, PT is 16 hours behind CST Asia.

For most of the year, working hours of 9:00 am to 5:00 pm in PT correspond to 12:00 am (next day) to 8:00 am (next day) in CST Asia. At other times of the year, working hours of 9:00 am to 5:00 pm in PT correspond to 1:00 am (next day) to 9:00 am (next day) in CST Asia.For most of the year, working hours of 09:00 to 17:00 in PT correspond to 00:00 (next day) to 08:00 (next day) in CST Asia. At other times of the year, working hours of 09:00 to 17:00 in PT correspond to 01:00 (next day) to 09:00 (next day) in CST Asia.

Compare PT time with MDT, CT, ET, GMT, London, Copenhagen, Istanbul, IST, and CST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Pacific Daylight Time is 1 hour behind Mountain Daylight Time. Pacific Daylight Time is 2 hours behind Central Daylight Time. Pacific Daylight Time is 3 hours behind Eastern Daylight Time. Pacific Daylight Time is 7 hours behind Greenwich Mean Time. Pacific Daylight Time is 8 hours behind BST (British Summer Time). Pacific Daylight Time is 9 hours behind CEST (Central European Summer Time). Pacific Daylight Time is 10 hours behind TRT (Turkey Time). Pacific Daylight Time is 12 hours and 30 minutes behind India Standard Time. Pacific Daylight Time is 15 hours behind China Standard Time.
5:00 am05:00 in PDT is 6:00 am06:00 in MDT and is 7:00 am07:00 in CDT and is 8:00 am08:00 in EDT and is 12:00 pm12:00 in GMT and is 1:00 pm13:00 in London, United Kingdom and is 2:00 pm14:00 in Copenhagen, Denmark and is 3:00 pm15:00 in Istanbul, Turkey and is 5:30 pm17:30 in IST and is 8:00 pm20:00 in CST

PDT to MDT call time
Best time for a conference call or a meeting is between 9am-4pm09:00-16:00 in PDT which corresponds to 10am-5pm10:00-17:00 in MDT
PDT to CDT call time
Best time for a conference call or a meeting is between 9am-3pm09:00-15:00 in PDT which corresponds to 11am-5pm11:00-17:00 in CDT
PDT to EDT call time
Best time for a conference call or a meeting is between 9am-2pm09:00-14:00 in PDT which corresponds to 12pm-5pm12:00-17:00 in EDT
PDT to GMT call time
Best time for a conference call or a meeting is between 9am-10am09:00-10:00 in PDT which corresponds to 4pm-5pm16:00-17:00 in GMT
PDT to London call time
Best time for a conference call or a meeting is between 8:30am-9:30am08:30-09:30 in PDT which corresponds to 4:30pm-5:30pm16:30-17:30 in London
PDT to Copenhagen call time
Best time for a conference call or a meeting is between 8am-9am08:00-09:00 in PDT which corresponds to 5pm-6pm17:00-18:00 in Copenhagen
PDT to Istanbul call time
Best time for a conference call or a meeting is between 7:30am-8:30am07:30-08:30 in PDT which corresponds to 5:30pm-6:30pm17:30-18:30 in Istanbul
PDT to IST call time
Best time for a conference call or a meeting is between 6:30pm-7:30pm18:30-19:30 in PDT which corresponds to 7am-8am07:00-08:00 in IST (next day)
PDT to CST call time
Best time for a conference call or a meeting is between 5pm-6pm17:00-18:00 in PDT which corresponds to 8am-9am08:00-09:00 in CST (next day)

5:00 am05:00 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
6:00 am06:00 Mountain Daylight Time (MDT). Offset UTC -6:00 hours
7:00 am07:00 Central Daylight Time (CDT). Offset UTC -5:00 hours
8:00 am08:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
1:00 pm13:00 BST (British Summer Time) (London, United Kingdom). Offset UTC +1:00 hour
2:00 pm14:00 CEST (Central European Summer Time) (Copenhagen, Denmark). Offset UTC +2:00 hours
3:00 pm15:00 TRT (Turkey Time) (Istanbul, Turkey). Offset UTC +3:00 hours
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
8:00 pm20:00 China Standard Time (CST). Offset UTC +8:00 hours

5:00 am05:00 PDT / 6:00 am06:00 MDT / 7:00 am07:00 CDT / 8:00 am08:00 EDT / 12:00 pm12:00 GMT / 1:00 pm13:00 London, United Kingdom / 2:00 pm14:00 Copenhagen, Denmark / 3:00 pm15:00 Istanbul, Turkey / 5:30 pm17:30 IST / 8:00 pm20:00 CST

PTMDTCTETGMTLondon, United KingdomCopenhagen, DenmarkIstanbul, TurkeyISTCST
12:00am1:00am2:00am3:00am7:00am8:00am9:00am10:00am12:30pm3:00pm
1:00am2:00am3:00am4:00am8:00am9:00am10:00am11:00am1:30pm4:00pm
2:00am3:00am4:00am5:00am9:00am10:00am11:00am12:00pm2:30pm5:00pm
3:00am4:00am5:00am6:00am10:00am11:00am12:00pm1:00pm3:30pm6:00pm
4:00am5:00am6:00am7:00am11:00am12:00pm1:00pm2:00pm4:30pm7:00pm
5:00am6:00am7:00am8:00am12:00pm1:00pm2:00pm3:00pm5:30pm8:00pm
6:00am7:00am8:00am9:00am1:00pm2:00pm3:00pm4:00pm6:30pm9:00pm
7:00am8:00am9:00am10:00am2:00pm3:00pm4:00pm5:00pm7:30pm10:00pm
8:00am9:00am10:00am11:00am3:00pm4:00pm5:00pm6:00pm8:30pm11:00pm
9:00am10:00am11:00am12:00pm4:00pm5:00pm6:00pm7:00pm9:30pm12:00am
10:00am11:00am12:00pm1:00pm5:00pm6:00pm7:00pm8:00pm10:30pm1:00am
11:00am12:00pm1:00pm2:00pm6:00pm7:00pm8:00pm9:00pm11:30pm2:00am
12:00pm1:00pm2:00pm3:00pm7:00pm8:00pm9:00pm10:00pm12:30am3:00am
1:00pm2:00pm3:00pm4:00pm8:00pm9:00pm10:00pm11:00pm1:30am4:00am
2:00pm3:00pm4:00pm5:00pm9:00pm10:00pm11:00pm12:00am2:30am5:00am
3:00pm4:00pm5:00pm6:00pm10:00pm11:00pm12:00am1:00am3:30am6:00am
4:00pm5:00pm6:00pm7:00pm11:00pm12:00am1:00am2:00am4:30am7:00am
5:00pm6:00pm7:00pm8:00pm12:00am1:00am2:00am3:00am5:30am8:00am
6:00pm7:00pm8:00pm9:00pm1:00am2:00am3:00am4:00am6:30am9:00am
7:00pm8:00pm9:00pm10:00pm2:00am3:00am4:00am5:00am7:30am10:00am
8:00pm9:00pm10:00pm11:00pm3:00am4:00am5:00am6:00am8:30am11:00am
9:00pm10:00pm11:00pm12:00am4:00am5:00am6:00am7:00am9:30am12:00pm
10:00pm11:00pm12:00am1:00am5:00am6:00am7:00am8:00am10:30am1:00pm
11:00pm12:00am1:00am2:00am6:00am7:00am8:00am9:00am11:30am2:00pm
00:0001:0002:0003:0007:0008:0009:0010:0012:3015:00
01:0002:0003:0004:0008:0009:0010:0011:0013:3016:00
02:0003:0004:0005:0009:0010:0011:0012:0014:3017:00
03:0004:0005:0006:0010:0011:0012:0013:0015:3018:00
04:0005:0006:0007:0011:0012:0013:0014:0016:3019:00
05:0006:0007:0008:0012:0013:0014:0015:0017:3020:00
06:0007:0008:0009:0013:0014:0015:0016:0018:3021:00
07:0008:0009:0010:0014:0015:0016:0017:0019:3022:00
08:0009:0010:0011:0015:0016:0017:0018:0020:3023:00
09:0010:0011:0012:0016:0017:0018:0019:0021:3000:00
10:0011:0012:0013:0017:0018:0019:0020:0022:3001:00
11:0012:0013:0014:0018:0019:0020:0021:0023:3002:00
12:0013:0014:0015:0019:0020:0021:0022:0000:3003:00
13:0014:0015:0016:0020:0021:0022:0023:0001:3004:00
14:0015:0016:0017:0021:0022:0023:0000:0002:3005:00
15:0016:0017:0018:0022:0023:0000:0001:0003:3006:00
16:0017:0018:0019:0023:0000:0001:0002:0004:3007:00
17:0018:0019:0020:0000:0001:0002:0003:0005:3008:00
18:0019:0020:0021:0001:0002:0003:0004:0006:3009:00
19:0020:0021:0022:0002:0003:0004:0005:0007:3010:00
20:0021:0022:0023:0003:0004:0005:0006:0008:3011:00
21:0022:0023:0000:0004:0005:0006:0007:0009:3012:00
22:0023:0000:0001:0005:0006:0007:0008:0010:3013:00
23:0000:0001:0002:0006:0007:0008:0009:0011:3014:00

Pacific Time

Pacific Time (PT) is a general term used to describe the areas that observe either the Pacific Standard Time (PST) or Pacific Daylight Time (PDT) in the United States and Canada. PT also called Pacific Coast Time. PT is not static but switches between PDT and PST.

Territories observing the Pacific Time Zone are primarily in North America. It runs through the western part of Canada, the United States and the Northwestern part of Mexico.

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

Principal Cities: The largest city in the PST time zone is Los Angeles in the United States, with about 3.793 million people. Other major cities in this time zone include Vancouver, Tijuana, San Diego, San Jose.

French: HNP - Heure Normale du Pacifique

Spanish: PT - Tiempo del Pacífico, PT - Zona Noroeste

PT 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 PT
  • U - short form of 'Uniform'
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 Daylight Time

Offset: MDT is 6 hours behind Greenwich Mean Time (GMT) and is used in North America

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

Principal Cities: The largest city in the MDT time zone is Calgary in Canada, with about 1.307 million people. Other major cities in this time zone include Edmonton, Denver, El Paso, Albuquerque.

French: HAR - Heure Avancée des Rocheuses

Spanish: MT - Zona Pacífico

MDT Time Zone Geo Map
MDT timezone map

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).

Daylight saving time clock moves forward for one hourStart: 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.

Daylight saving time clock moves back for one hourEnd: 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.

See upcoming clock changes worldwide.

MDT 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 MDT
  • S - short form of 'Sierra'
IANA/Olson: Reflects MDT 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/Denver
  • America/Edmonton
  • America/Inuvik
  • America/Shiprock
  • America/Yellowknife
  • Canada/Mountain
  • MST7MDT
  • Navajo
  • US/Mountain
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

Central Time

Central Time (CT) is a general term used to describe the areas that observe either the Central Standard Time (CST) or Central Daylight Time (CDT) in the United States and Canada. CT is not static but switches between CDT and CST.

Territories observing the time zone are primarily in North and Central America. It runs through several Mexican and U.S. states, as well as several Canadian provinces and Central American countries.

Countries using this time zone: Belize, Canada, Costa Rica, Guatemala, Honduras, Mexico, Nicaragua, El Salvador, 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, Iztapalapa, Ecatepec.

French: HNC - Heure Normale du Centre

Spanish: CT - Tiempo Central Estándar, CT - Zona Centro

CT 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 CT
  • S - short form of 'Sierra'
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 Time

Eastern Time (ET) is a general term used to describe the areas that observe either the Eastern Standard Time (EST) or Eastern Daylight Time (EDT) in the United States and Canada. ET is not static but switches between EDT and EST.

ET is also used somewhat as a de facto official time for all of the United States because it encompasses 17 U.S. states in the eastern part of the contiguous United States including the capital city Washington D.C., the most populous city New York and half of the country’s population.

In the United States nationally televised programs, evening newscasts, talent and awards shows, and any other nationally televised event that airs live on American television during prime time and on the weekends are broadcast live in the Eastern Time Zone. Major professional sports leagues MLB, NBA, NFL and NHL also provide their game times in Eastern Time, even if teams are from outside of Eastern Time.

Countries using this time zone: Bahamas, Canada, Haiti, Jamaica, Cayman Islands, Mexico, Panama, Turks & Caicos Is, United States.

Principal Cities: The largest city in the EST time zone is New York City in the United States, with about 8.175 million people. Other major cities in this time zone include Toronto, Montreal, Brooklyn, Borough of Queens.

French: HNE - Heure Normale de l'Est

Spanish: ET - Tiempo del Este, ET - Zona Sureste

ET 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 ET
  • R - short form of 'Romeo'
ET Abbreviation: Several time zones share ET abbreviation and it could refer to these time zones
  • Eastern Time - UTC -5
  • Tiempo del Este - UTC -5
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 0 hours ahead Greenwich Mean Time (GMT) and is used in Europe

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 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 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 Time Zone Geo Map
GMT timezone map

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 - Universal Time Coordinated
  • WT - Western Sahara Standard Time
  • Z - Zulu Time Zone

London Information

Time Zone

Abbreviation / Name
BST - British Summer Time
GMT - Greenwich Mean Time
UTC / GMT Offset
+1:00 hours during British Summer Time, currently in use.
+0:00 hours during Greenwich Mean Time.
Daylight Saving Time Change
+1:00 hour - DST is in use
Daylight Saving Time Starts
Daylight saving time clock moves forward for one hourSunday, March 29, 2026 at 1:00 amSunday, March 29, 2026 at 01:00 local time. DST starts annually on the last Sunday of March. Clocks are turned forward 1 hour to Sunday, March 29, 2026 at 2:00 amSunday, March 29, 2026 at 02:00 local daylight time instead. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
Daylight saving time clock moves backward for one hourSunday, October 25, 2026 at 2:00 amSunday, October 25, 2026 at 02:00 local time. DST ends annually on the last Sunday of October. Clocks are turned backward 1 hour to Sunday, October 25, 2026 at 1:00 amSunday, October 25, 2026 at 01:00 local standard time instead. Also called Fall Back or switch to Winter Time.

London Facts

Country
United Kingdom
Alternative Names
ILondon, LON, Lakana, Landan, Landen, Ljondan, Llundain, Lodoni, Londain, Londan, Londar, Londe, Londen, Londin, Londinium, Londino, Londn, London, London osh, Londona, Londonas, Londoni, Londono, Londons, Londonu, Londra, Londres, Londrez, Londri, Londro, Londye, Londyn, Londýn, Lonn, Lontoo, Loundres, Luan GJon, Lun-tun, Lunden, Lundra, Lundun, Lundunir, Lundúnir, Lung-dung, Lunnainn, Lunnin, Lunnon, Luân Đôn, Lùn-tûn, Lùng-dŭng, Lûn-tun, Lākana, Lůndůn, Lọndọnu, Ranana, Rānana, ilantan, ladana, landan, landana, leondeon, lndn, london, londoni, lun dui, lun dun, lwndwn, lxndxn, rondon, Łondra, Λονδίνο, Лондан, Лондон, Лондон ош, Лондонъ, Лёндан, Լոնդոն, לאנדאן, לונדון, لأندأن, لندن, لوندون, لەندەن, ܠܘܢܕܘܢ, लंडन, लंदन, लण्डन, लन्डन्, लन्दन, লন্ডন, ਲੰਡਨ, લંડન, ଲଣ୍ଡନ, இலண்டன், లండన్, ಲಂಡನ್, ലണ്ടൻ, ලන්ඩන්, ลอนดอน, ລອນດອນ, ལོན་ཊོན།, လန်ဒန်မြို့, ლონდონი, ለንደን, ᎫᎴ ᏗᏍᎪᏂᎯᏱ, ロンドン, 伦敦, 倫敦, 런던
Population
8,961,989
Currency
Pound (GBP)
Geographic Coordinates
51° 30' N Latitude / 0° 07' W Longitude
International Dialing Code
+44

Copenhagen Information

Time Zone

Abbreviation / Name
CEST - Central European Summer Time
CET - Central European Standard Time
UTC / GMT Offset
+2:00 hours during Central European Summer Time, currently in use.
+1:00 hours during Central European Standard Time.
Daylight Saving Time Change
+1:00 hour - DST is in use
Daylight Saving Time Starts
Daylight saving time clock moves forward for one hourSunday, March 29, 2026 at 2:00 amSunday, March 29, 2026 at 02:00 local time. DST starts annually on the last Sunday of March. Clocks are turned forward 1 hour to Sunday, March 29, 2026 at 3:00 amSunday, March 29, 2026 at 03:00 local daylight time instead. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
Daylight saving time clock moves backward for one hourSunday, October 25, 2026 at 3:00 amSunday, October 25, 2026 at 03:00 local time. DST ends annually on the last Sunday of October. Clocks are turned backward 1 hour to Sunday, October 25, 2026 at 2:00 amSunday, October 25, 2026 at 02:00 local standard time instead. Also called Fall Back or switch to Winter Time.

Copenhagen Facts

Country
Denmark
Alternative Names
CPH, Cobanhavan, Copenaga, Copenaghen, Copenaguen, Copenhaga, Copenhagen, Copenhague, Copenhaguen, Copenhaguen - Kobenhavn, Copenhaguen - København, Cóbanhávan, Hafnia, Kapehngagen, Kaupmannahoefn, Kaupmannahöfn, Keypmannahavn, Kjobenhavn, Kjopenhamn, Kjøpenhamn, Kobenhamman, Kobenhaven, Kobenhavn, Kodan, Kodaň, Koebenhavn, Koeoepenhamina, Koepenhamn, Kopenage, Kopenchage, Kopengagen, Kopenhaagen, Kopenhag, Kopenhaga, Kopenhage, Kopenhagen, Kopenhagena, Kopenhago, Kopenhāgena, Kopenkhagen, Koppenhaga, Koppenhága, Kòpenhaga, Köbenhavn, Köpenhamn, Kööpenhamina, København, Københámman, ge ben ha gen, khopenheken, kopanahagana, kopenahagena, kopenahegena, kopenhagen, kwbnhaghn, kwpnhgn, qwpnhgn, Κοπεγχάγη, Капэнгаген, Копенгаген, Копенхаген, Կոպենհագեն, קופנהאגן, קופנהגן, كوبنهاغن, كوپېنھاگېن, ܟܘܦܢܗܓܢ, कोपनहागन, কোপেনহাগেন, কোপেনহেগেন, โคเปนเฮเกน, ཀའོ་པེན་ཧ་ཀེན, კოპენჰაგენი, ኮፐንሀገን, ኮፕንሀግ, コペンハーゲン, 哥本哈根, 코펜하겐
Population
1,153,615
Currency
Krone (DKK)
Geographic Coordinates
55° 40' N Latitude / 12° 33' E Longitude
International Dialing Code
+45

Istanbul Information

Time Zone

Abbreviation / Name
GMT+3 - Türkiye Standard Time
TRT - Turkey Time
UTC / GMT Offset
+3:00 hours during Türkiye Standard Time, currently in use.
+3:00 hours during Turkey Time.
Daylight Saving Time Change
+0:00 hours - DST is NOT in use
Daylight Saving Time Starts
Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
Also called Fall Back or switch to Winter Time.

Istanbul Facts

Country
Turkey
Alternative Names
Bizanc, Bizánc, Byzance, Byzantion, Byzantium, Byzanz, Constantinoble, Constantinopla, Constantinople, Constantinopolen, Constantinopoli, Constantinopolis, Costantinopoli, Estambul, IST, Istamboul, Istambul, Istambuł, Istampoul, Istanbul, Istanbúl, Isztambul, Konstantinapoly, Konstantinopel, Konstantinopolo, Konstantinoupoli, Konstantinoupolis, Konstantinápoly, Kustantiniyah, Micklagard, Micklagård, Mikligardur, Mikligarður, Stamboul, Stambul, Stambula, Stambuł, Tsarigrad, Vizantija (Vizantija), Vyzantio, astnbwl, bijantium, byuzantion, byzntywn, iseutanbul, istambula, isutanburu, stin Poli [stimˈboli], yi si tan bu er, İstanbul, Βυζάντιο, Βυζαντιο, Ισταμπουλ, Ισταμπούλ, Κωνσταντινουπολη, Κωνσταντινούπολη, Κωνσταντινούπολις, στην Πόλι [stimˈboli], Византија (Vizantija), Истанбул, Стамбул, ביזנטיון, اسطنبول, इस्तांबुल, ইস্তাম্বুল, イスタンブール, ビュザンティオン, 伊斯坦布尔, 비잔티움, 이스탄불
Population
15,701,602
Currency
Lira (TRY)
Geographic Coordinates
41° 00' N Latitude / 28° 56' E Longitude
International Dialing Code
+90

India Standard Time

Offset: IST is 5 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia

Countries using this time zone: India

Principal Cities: The largest city in the IST time zone is Mumbai in India, with about 12.692 million people. Other major cities in this time zone include Delhi, Bangalore, Chennai, Kolkata.

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

IST Time Zone Geo Map
IST timezone map

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 an offset of five hours and thirty minutes 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

China Standard Time

Offset: CST is 8 hours ahead Greenwich Mean Time (GMT) and is used in Asia

Countries using this time zone: China, Macau, Taiwan

Principal Cities: The largest city in the CST time zone is Shanghai in China, with about 24.875 million people. Other major cities in this time zone include Beijing, Chengdu, Taipei, Chongqing.

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

CST Time Zone Geo Map
CST timezone map

CST 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 east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Hotel - Military abbreviation for CST
  • H - short form of 'Hotel'
IANA/Olson: Reflects CST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Chongqing
  • Asia/Chungking
  • Asia/Harbin
  • Asia/Macao
  • Asia/Macau
  • Asia/Shanghai
  • Asia/Taipei
  • PRC
  • ROC
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 +8 offset:
  • 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