PT to MDT to CT to ET to GMT to London to Copenhagen to Istanbul to IST to CST Asia Time Converter
The United Kingdom is on summer time: BST (UTC+1) until Sun, Oct 25.
Iceland and Ghana stay on GMT (UTC+0).
Quick answers
Selected conversion
7:00 am07:00 PDT (UTC-7), Oct 9, 2026 = 8:00 am08:00 MDT (UTC-6), Oct 9, 2026 = 9:00 am09:00 CDT (UTC-5), Oct 9, 2026 = 10:00 am10:00 EDT (UTC-4), Oct 9, 2026 = 2:00 pm14:00 GMT (UTC+0), Oct 9, 2026 = 3:00 pm15:00 BST (UTC+1), Oct 9, 2026 = 4:00 pm16:00 CEST (UTC+2), Oct 9, 2026 = 5:00 pm17:00 TRT (UTC+3), Oct 9, 2026 = 7:30 pm19:30 IST (UTC+5:30), Oct 9, 2026 = 10:00 pm22:00 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.
7:00 am07:00 in PDT is 8:00 am08:00 in MDT and is 9:00 am09:00 in CDT and is 10:00 am10:00 in EDT and is 2:00 pm14:00 in GMT and is 3:00 pm15:00 in London, United Kingdom and is 4:00 pm16:00 in Copenhagen, Denmark and is 5:00 pm17:00 in Istanbul, Turkey and is 7:30 pm19:30 in IST and is 10:00 pm22:00 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)
7:00 am07:00 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
8:00 am08:00 Mountain Daylight Time (MDT). Offset UTC -6:00 hours
9:00 am09:00 Central Daylight Time (CDT). Offset UTC -5:00 hours
10:00 am10:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
2:00 pm14:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
3:00 pm15:00 BST (British Summer Time) (London, United Kingdom). Offset UTC +1:00 hour
4:00 pm16:00 CEST (Central European Summer Time) (Copenhagen, Denmark). Offset UTC +2:00 hours
5:00 pm17:00 TRT (Turkey Time) (Istanbul, Turkey). Offset UTC +3:00 hours
7:30 pm19:30 India Standard Time (IST). Offset UTC +5:30 hours
10:00 pm22:00 China Standard Time (CST). Offset UTC +8:00 hours
7:00 am07:00 PDT / 8:00 am08:00 MDT / 9:00 am09:00 CDT / 10:00 am10:00 EDT / 2:00 pm14:00 GMT / 3:00 pm15:00 London, United Kingdom / 4:00 pm16:00 Copenhagen, Denmark / 5:00 pm17:00 Istanbul, Turkey / 7:30 pm19:30 IST / 10:00 pm22:00 CST
| PT | MDT | CT | ET | GMT | London, United Kingdom | Copenhagen, Denmark | Istanbul, Turkey | IST | CST |
|---|---|---|---|---|---|---|---|---|---|
| 12:00am | 1:00am | 2:00am | 3:00am | 7:00am | 8:00am | 9:00am | 10:00am | 12:30pm | 3:00pm |
| 1:00am | 2:00am | 3:00am | 4:00am | 8:00am | 9:00am | 10:00am | 11:00am | 1:30pm | 4:00pm |
| 2:00am | 3:00am | 4:00am | 5:00am | 9:00am | 10:00am | 11:00am | 12:00pm | 2:30pm | 5:00pm |
| 3:00am | 4:00am | 5:00am | 6:00am | 10:00am | 11:00am | 12:00pm | 1:00pm | 3:30pm | 6:00pm |
| 4:00am | 5:00am | 6:00am | 7:00am | 11:00am | 12:00pm | 1:00pm | 2:00pm | 4:30pm | 7:00pm |
| 5:00am | 6:00am | 7:00am | 8:00am | 12:00pm | 1:00pm | 2:00pm | 3:00pm | 5:30pm | 8:00pm |
| 6:00am | 7:00am | 8:00am | 9:00am | 1:00pm | 2:00pm | 3:00pm | 4:00pm | 6:30pm | 9:00pm |
| 7:00am | 8:00am | 9:00am | 10:00am | 2:00pm | 3:00pm | 4:00pm | 5:00pm | 7:30pm | 10:00pm |
| 8:00am | 9:00am | 10:00am | 11:00am | 3:00pm | 4:00pm | 5:00pm | 6:00pm | 8:30pm | 11:00pm |
| 9:00am | 10:00am | 11:00am | 12:00pm | 4:00pm | 5:00pm | 6:00pm | 7:00pm | 9:30pm | 12:00am |
| 10:00am | 11:00am | 12:00pm | 1:00pm | 5:00pm | 6:00pm | 7:00pm | 8:00pm | 10:30pm | 1:00am |
| 11:00am | 12:00pm | 1:00pm | 2:00pm | 6:00pm | 7:00pm | 8:00pm | 9:00pm | 11:30pm | 2:00am |
| 12:00pm | 1:00pm | 2:00pm | 3:00pm | 7:00pm | 8:00pm | 9:00pm | 10:00pm | 12:30am | 3:00am |
| 1:00pm | 2:00pm | 3:00pm | 4:00pm | 8:00pm | 9:00pm | 10:00pm | 11:00pm | 1:30am | 4:00am |
| 2:00pm | 3:00pm | 4:00pm | 5:00pm | 9:00pm | 10:00pm | 11:00pm | 12:00am | 2:30am | 5:00am |
| 3:00pm | 4:00pm | 5:00pm | 6:00pm | 10:00pm | 11:00pm | 12:00am | 1:00am | 3:30am | 6:00am |
| 4:00pm | 5:00pm | 6:00pm | 7:00pm | 11:00pm | 12:00am | 1:00am | 2:00am | 4:30am | 7:00am |
| 5:00pm | 6:00pm | 7:00pm | 8:00pm | 12:00am | 1:00am | 2:00am | 3:00am | 5:30am | 8:00am |
| 6:00pm | 7:00pm | 8:00pm | 9:00pm | 1:00am | 2:00am | 3:00am | 4:00am | 6:30am | 9:00am |
| 7:00pm | 8:00pm | 9:00pm | 10:00pm | 2:00am | 3:00am | 4:00am | 5:00am | 7:30am | 10:00am |
| 8:00pm | 9:00pm | 10:00pm | 11:00pm | 3:00am | 4:00am | 5:00am | 6:00am | 8:30am | 11:00am |
| 9:00pm | 10:00pm | 11:00pm | 12:00am | 4:00am | 5:00am | 6:00am | 7:00am | 9:30am | 12:00pm |
| 10:00pm | 11:00pm | 12:00am | 1:00am | 5:00am | 6:00am | 7:00am | 8:00am | 10:30am | 1:00pm |
| 11:00pm | 12:00am | 1:00am | 2:00am | 6:00am | 7:00am | 8:00am | 9:00am | 11:30am | 2:00pm |
| 00:00 | 01:00 | 02:00 | 03:00 | 07:00 | 08:00 | 09:00 | 10:00 | 12:30 | 15:00 |
| 01:00 | 02:00 | 03:00 | 04:00 | 08:00 | 09:00 | 10:00 | 11:00 | 13:30 | 16:00 |
| 02:00 | 03:00 | 04:00 | 05:00 | 09:00 | 10:00 | 11:00 | 12:00 | 14:30 | 17:00 |
| 03:00 | 04:00 | 05:00 | 06:00 | 10:00 | 11:00 | 12:00 | 13:00 | 15:30 | 18:00 |
| 04:00 | 05:00 | 06:00 | 07:00 | 11:00 | 12:00 | 13:00 | 14:00 | 16:30 | 19:00 |
| 05:00 | 06:00 | 07:00 | 08:00 | 12:00 | 13:00 | 14:00 | 15:00 | 17:30 | 20:00 |
| 06:00 | 07:00 | 08:00 | 09:00 | 13:00 | 14:00 | 15:00 | 16:00 | 18:30 | 21:00 |
| 07:00 | 08:00 | 09:00 | 10:00 | 14:00 | 15:00 | 16:00 | 17:00 | 19:30 | 22:00 |
| 08:00 | 09:00 | 10:00 | 11:00 | 15:00 | 16:00 | 17:00 | 18:00 | 20:30 | 23:00 |
| 09:00 | 10:00 | 11:00 | 12:00 | 16:00 | 17:00 | 18:00 | 19:00 | 21:30 | 00:00 |
| 10:00 | 11:00 | 12:00 | 13:00 | 17:00 | 18:00 | 19:00 | 20:00 | 22:30 | 01:00 |
| 11:00 | 12:00 | 13:00 | 14:00 | 18:00 | 19:00 | 20:00 | 21:00 | 23:30 | 02:00 |
| 12:00 | 13:00 | 14:00 | 15:00 | 19:00 | 20:00 | 21:00 | 22:00 | 00:30 | 03:00 |
| 13:00 | 14:00 | 15:00 | 16:00 | 20:00 | 21:00 | 22:00 | 23:00 | 01:30 | 04:00 |
| 14:00 | 15:00 | 16:00 | 17:00 | 21:00 | 22:00 | 23:00 | 00:00 | 02:30 | 05:00 |
| 15:00 | 16:00 | 17:00 | 18:00 | 22:00 | 23:00 | 00:00 | 01:00 | 03:30 | 06:00 |
| 16:00 | 17:00 | 18:00 | 19:00 | 23:00 | 00:00 | 01:00 | 02:00 | 04:30 | 07:00 |
| 17:00 | 18:00 | 19:00 | 20:00 | 00:00 | 01:00 | 02:00 | 03:00 | 05:30 | 08:00 |
| 18:00 | 19:00 | 20:00 | 21:00 | 01:00 | 02:00 | 03:00 | 04:00 | 06:30 | 09:00 |
| 19:00 | 20:00 | 21:00 | 22:00 | 02:00 | 03:00 | 04:00 | 05:00 | 07:30 | 10:00 |
| 20:00 | 21:00 | 22:00 | 23:00 | 03:00 | 04:00 | 05:00 | 06:00 | 08:30 | 11:00 |
| 21:00 | 22:00 | 23:00 | 00:00 | 04:00 | 05:00 | 06:00 | 07:00 | 09:30 | 12:00 |
| 22:00 | 23:00 | 00:00 | 01:00 | 05:00 | 06:00 | 07:00 | 08:00 | 10:30 | 13:00 |
| 23:00 | 00:00 | 01:00 | 02:00 | 06:00 | 07:00 | 08:00 | 09:00 | 11:30 | 14:00 |
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
- -08 - basic short
- -0800 - basic
- -08:00 - extended
- -0800 - sign character (-) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates an offset of eight hours to the west of the zero meridian.
- Uniform - Military abbreviation for PT
- U - short form of 'Uniform'
- 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

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
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
- -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 CT
- S - short form of 'Sierra'
- 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
- -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 ET
- R - short form of 'Romeo'
- Eastern Time - UTC -5
- Tiempo del Este - UTC -5
- 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 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 - Universal Time Coordinated
- WT - Western Sahara Standard Time
- Z - Zulu Time Zone
London Information
Time Zone
GMT - Greenwich Mean Time
+0:00 hours during Greenwich Mean Time.
Sunday, 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.
Sunday, 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
Copenhagen Information
Time Zone
CET - Central European Standard Time
+1:00 hours during Central European Standard Time.
Sunday, 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.
Sunday, 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
Istanbul Information
Time Zone
TRT - Turkey Time
+3:00 hours during Turkey Time.
Istanbul Facts
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 representations, usage and related time zones
- +0530 - basic
- +05:30 - extended
- +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates an offset of five hours and thirty minutes to the east of the zero meridian.
- Asia/Calcutta
- Asia/Kolkata
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2
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 representations, usage and related time zones
- +08 - basic short
- +0800 - basic
- +08:00 - extended
- +0800 - sign character (+) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates an offset of eight hours to the east of the zero meridian.
- Hotel - Military abbreviation for CST
- H - short form of 'Hotel'
- Asia/Chongqing
- Asia/Chungking
- Asia/Harbin
- Asia/Macao
- Asia/Macau
- Asia/Shanghai
- Asia/Taipei
- PRC
- ROC
- Central Standard Time - UTC -6
- China Standard Time - UTC +8
- Cuba Standard Time - UTC -5
- 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
