GST to CET to GMT to EST to CDT to MST to PDT Time Converter

Updating current time…
GST
Gulf Standard Time
UTC+4
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CEST/CET
Central European Summer Time
UTC+2
2h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Central Europe is on summer time: CEST (UTC+2) until Sun, Oct 25.
Use CET all year (UTC+1)
GMT
Greenwich Mean Time
UTC+0
4h behind
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).

Iceland, Ghana · GMT all year (UTC+0)United Kingdom · BST (UTC+1)
EDT/EST
Eastern Daylight Time
UTC−4
8h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Eastern Time is on daylight saving time: EDT (UTC−4) until Sun, Nov 1.
Use EST all year (UTC−5)
CDT
Central Daylight Time
UTC−5
9h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm
MDT/MST
Mountain Daylight Time
UTC−6
10h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Mountain Time is on daylight saving time: MDT (UTC−6) until Sun, Nov 1.

Arizona stays on MST (UTC−7).

Denver · MDT (UTC−6)Arizona · MST all year (UTC−7)
PDT
Pacific Daylight Time
UTC−7
11h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

4:00 pm16:00 GST (UTC+4), Oct 17, 2026 = 2:00 pm14:00 CEST (UTC+2), Oct 17, 2026 = 12:00 pm12:00 GMT (UTC+0), Oct 17, 2026 = 8:00 am08:00 EDT (UTC-4), Oct 17, 2026 = 7:00 am07:00 CDT (UTC-5), Oct 17, 2026 = 6:00 am06:00 MDT (UTC-6), Oct 17, 2026 = 5:00 am05:00 PDT (UTC-7), Oct 17, 2026

GST is 2 hours ahead of CEST. GST is 4 hours ahead of GMT. GST is 8 hours ahead of EDT. GST is 9 hours ahead of CDT. GST is 10 hours ahead of MDT. GST is 11 hours ahead of PDT.

How the time difference changes

GST to CET

For most of the year, GST is 2 hours ahead of CEST. From Oct 25, 2026 to Mar 28, 2027, GST is 3 hours ahead of CET.

For most of the year, working hours of 9:00 am to 6:00 pm in GST correspond to 7:00 am to 4:00 pm in CEST. At other times of the year, working hours of 9:00 am to 6:00 pm in GST correspond to 6:00 am to 3:00 pm in CET.For most of the year, working hours of 09:00 to 18:00 in GST correspond to 07:00 to 16:00 in CEST. At other times of the year, working hours of 09:00 to 18:00 in GST correspond to 06:00 to 15:00 in CET.

GST to GMT

GST is 4 hours ahead of GMT year-round.

Working hours of 9:00 am to 6:00 pm in GST correspond to 5:00 am to 2:00 pm in GMT.Working hours of 09:00 to 18:00 in GST correspond to 05:00 to 14:00 in GMT.

GST to EST

For most of the year, GST is 8 hours ahead of EDT. From Nov 1, 2026 to Mar 14, 2027, GST is 9 hours ahead of EST.

For most of the year, working hours of 9:00 am to 6:00 pm in GST correspond to 1:00 am to 10:00 am in EDT. At other times of the year, working hours of 9:00 am to 6:00 pm in GST correspond to 12:00 am to 9:00 am in EST.For most of the year, working hours of 09:00 to 18:00 in GST correspond to 01:00 to 10:00 in EDT. At other times of the year, working hours of 09:00 to 18:00 in GST correspond to 00:00 to 09:00 in EST.

GST to CDT

For most of the year, GST is 9 hours ahead of CDT. From Nov 1, 2026 to Mar 14, 2027, GST is 10 hours ahead of CST.

For most of the year, working hours of 9:00 am to 6:00 pm in GST correspond to 12:00 am to 9:00 am in CDT. At other times of the year, working hours of 9:00 am to 6:00 pm in GST correspond to 11:00 pm (previous day) to 8:00 am in CST.For most of the year, working hours of 09:00 to 18:00 in GST correspond to 00:00 to 09:00 in CDT. At other times of the year, working hours of 09:00 to 18:00 in GST correspond to 23:00 (previous day) to 08:00 in CST.

GST to MST

For most of the year, GST is 10 hours ahead of MDT. From Nov 1, 2026 to Mar 14, 2027, GST is 11 hours ahead of MST.

For most of the year, working hours of 9:00 am to 6:00 pm in GST correspond to 11:00 pm (previous day) to 8:00 am in MDT. At other times of the year, working hours of 9:00 am to 6:00 pm in GST correspond to 10:00 pm (previous day) to 7:00 am in MST.For most of the year, working hours of 09:00 to 18:00 in GST correspond to 23:00 (previous day) to 08:00 in MDT. At other times of the year, working hours of 09:00 to 18:00 in GST correspond to 22:00 (previous day) to 07:00 in MST.

GST to PDT

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

For most of the year, working hours of 9:00 am to 6:00 pm in GST correspond to 10:00 pm (previous day) to 7:00 am in PDT. At other times of the year, working hours of 9:00 am to 6:00 pm in GST correspond to 9:00 pm (previous day) to 6:00 am in PST.For most of the year, working hours of 09:00 to 18:00 in GST correspond to 22:00 (previous day) to 07:00 in PDT. At other times of the year, working hours of 09:00 to 18:00 in GST correspond to 21:00 (previous day) to 06:00 in PST.

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

Time Difference

Gulf Standard Time is 2 hours ahead of Central European Summer Time. Gulf Standard Time is 4 hours ahead of Greenwich Mean Time. Gulf Standard Time is 8 hours ahead of Eastern Daylight Time. Gulf Standard Time is 9 hours ahead of Central Daylight Time. Gulf Standard Time is 10 hours ahead of Mountain Daylight Time. Gulf Standard Time is 11 hours ahead of Pacific Daylight Time.
4:00 pm16:00 in GST is 2:00 pm14:00 in CEST and is 12:00 pm12:00 in GMT and 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

GST to CEST call time
Best time for a conference call or a meeting is between 11am-6pm11:00-18:00 in GST which corresponds to 9am-4pm09:00-16:00 in CEST
GST to GMT call time
Best time for a conference call or a meeting is between 1pm-6pm13:00-18:00 in GST which corresponds to 9am-2pm09:00-14:00 in GMT
GST to EDT call time
Best time for a conference call or a meeting is between 5pm-6pm17:00-18:00 in GST which corresponds to 9am-10am09:00-10:00 in EDT
GST to CDT call time
Best time for a conference call or a meeting is between 5:30pm-6:30pm17:30-18:30 in GST which corresponds to 8:30am-9:30am08:30-09:30 in CDT. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
GST to MDT call time
Best time for a conference call or a meeting is between 6pm-7pm18:00-19:00 in GST which corresponds to 8am-9am08:00-09:00 in MDT. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
GST to PDT call time
Best time for a conference call or a meeting is between 6:30pm-7:30pm18:30-19:30 in GST which corresponds to 7:30am-8:30am07:30-08:30 in PDT. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.

4:00 pm16:00 Gulf Standard Time (GST). Offset UTC +4:00 hours
2:00 pm14:00 Central European Summer Time (CEST). Offset UTC +2:00 hours
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

4:00 pm16:00 GST / 2:00 pm14:00 CEST / 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.

Hourly time comparison
GSTCESTGMTEDTCDTMDTPDT
10:00pm previous day8:00pm previous day4:00pm previous day3:00pm previous day2:00pm previous day1:00pm previous day
11:00pm previous day9:00pm previous day5:00pm previous day4:00pm previous day3:00pm previous day2:00pm previous day
12:00am10:00pm previous day6:00pm previous day5:00pm previous day4:00pm previous day3:00pm previous day
1:00am11:00pm previous day7:00pm previous day6:00pm previous day5:00pm previous day4:00pm previous day
2:00am12:00am8:00pm previous day7:00pm previous day6:00pm previous day5:00pm previous day
3:00am1:00am9:00pm previous day8:00pm previous day7:00pm previous day6:00pm previous day
4:00am2:00am10:00pm previous day9:00pm previous day8:00pm previous day7:00pm previous day
5:00am3:00am11:00pm previous day10:00pm previous day9:00pm previous day8:00pm previous day
6:00am4:00am12:00am11:00pm previous day10:00pm previous day9:00pm previous day
7:00am5:00am1:00am12:00am11:00pm previous day10:00pm previous day
8:00am6:00am2:00am1:00am12:00am11:00pm previous day
9:00am7:00am3:00am2:00am1:00am12:00am
10:00am8:00am4:00am3:00am2:00am1:00am
11:00am9:00am5:00am4:00am3:00am2:00am
12:00pm10:00am6:00am5:00am4:00am3:00am
1:00pm11:00am7:00am6:00am5:00am4:00am
2:00pm12:00pm8:00am7:00am6:00am5:00am
3:00pm1:00pm9:00am8:00am7:00am6:00am
4:00pm2:00pm10:00am9:00am8:00am7:00am
5:00pm3:00pm11:00am10:00am9:00am8:00am
6:00pm4:00pm12:00pm11:00am10:00am9:00am
7:00pm5:00pm1:00pm12:00pm11:00am10:00am
8:00pm6:00pm2:00pm1:00pm12:00pm11:00am
9:00pm7:00pm3:00pm2:00pm1:00pm12:00pm
22:00 previous day20:00 previous day16:00 previous day15:00 previous day14:00 previous day13:00 previous day
23:00 previous day21:00 previous day17:00 previous day16:00 previous day15:00 previous day14:00 previous day
00:0022:00 previous day18:00 previous day17:00 previous day16:00 previous day15:00 previous day
01:0023:00 previous day19:00 previous day18:00 previous day17:00 previous day16:00 previous day
02:0000:0020:00 previous day19:00 previous day18:00 previous day17:00 previous day
03:0001:0021:00 previous day20:00 previous day19:00 previous day18:00 previous day
04:0002:0022:00 previous day21:00 previous day20:00 previous day19:00 previous day
05:0003:0023:00 previous day22:00 previous day21:00 previous day20:00 previous day
06:0004:0000:0023:00 previous day22:00 previous day21:00 previous day
07:0005:0001:0000:0023:00 previous day22:00 previous day
08:0006:0002:0001:0000:0023:00 previous day
09:0007:0003:0002:0001:0000:00
10:0008:0004:0003:0002:0001:00
11:0009:0005:0004:0003:0002:00
12:0010:0006:0005:0004:0003:00
13:0011:0007:0006:0005:0004:00
14:0012:0008:0007:0006:0005:00
15:0013:0009:0008:0007:0006:00
16:0014:0010:0009:0008:0007:00
17:0015:0011:0010:0009:0008:00
18:0016:0012:0011:0010:0009:00
19:0017:0013:0012:0011:0010:00
20:0018:0014:0013:0012:0011:00
21:0019:0015:0014:0013:0012:00

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

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

Today the lighter areas are on UTC+2 (CEST).

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).

123456789101112End: Central European Time (CET) ended on Sunday, March 29, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 29, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the last Sunday of March.

123456789101112Start: Central European Time (CET) starts on Sunday, October 25, 2026 at 3:00 am03:00 local time and clocks are set one hour back to Sunday, October 25, 2026, 2:00 am02:00. Standard time starts annually on the last Sunday of October.

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

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

Today the lighter areas are on UTC+1 (British Summer Time, Irish Standard Time).

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

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

Today the lighter areas are on UTC−4 (EDT).

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).

123456789101112End: Eastern Standard Time (EST) ended 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 local daylight time instead. Standard time ends annually on the second Sunday of March.

123456789101112Start: Eastern Standard Time (EST) starts 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. Standard time starts annually on the first Sunday of November.

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

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

Map of the areas on Central Daylight Time (CDT)
CDT part of the year

Today all shaded areas are on CDT.

Open the world time zone map© OpenStreetMap

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).

123456789101112Start: 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.

123456789101112End: 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.

See USA daylight saving time and upcoming clock changes worldwide.

CDT 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 CDT
  • R - short form of 'Romeo'
IANA/Olson: Reflects CDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • 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
CDT Abbreviation: Several time zones share CDT abbreviation and it could refer to these time zones
  • Central Daylight Time - UTC -5
  • Cuba Daylight Time - UTC -4
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

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

Today the lighter areas are on UTC−6 (MDT).

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).

123456789101112End: Mountain Standard Time (MST) ended 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 local daylight time instead. Standard time ends annually on the second Sunday of March.

123456789101112Start: Mountain Standard Time (MST) starts 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. Standard time starts annually on the first Sunday of November.

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

Pacific Daylight Time

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

Countries using this time zone: 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

Map of the areas on Pacific Daylight Time (PDT)
PDT part of the year

Today all shaded areas are on PDT.

Open the world time zone map© OpenStreetMap

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).

123456789101112Start: 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.

123456789101112End: 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.

See USA daylight saving time and upcoming clock changes worldwide.

PDT 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 PDT
  • T - short form of 'Tango'
IANA/Olson: Reflects PDT 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
Time zones with the GMT -7 offset:
  • MST - Mountain Standard Time
  • PDT - Pacific Daylight Time
  • YST - Yukon Standard Time
  • T - Tango Time Zone
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT