UTC
Universal Time Coordinated
GMT +0
PDT
Pacific Daylight Time
GMT -7
CEST
Central European Summer Time
GMT +2
KST
Korea Standard Time
GMT +9
EDT/EST
Eastern Daylight Time
GMT -4
EST automatically adjusted to EDT time zone, that is in use

Time Difference

Universal Time Coordinated is 7 hours ahead of Pacific Daylight Time and 2 hours behind of Central European Summer Time and 9 hours behind of Korea Standard Time and 4 hours ahead of Eastern Daylight Time
11:00 pm23:00 in UTC is 4:00 pm16:00 in PDT and is 1:00 am01:00 in CEST and is 8:00 am08:00 in KST and is 7:00 pm19:00 in EDT

UTC to PDT call time
Best time for a conference call or a meeting is between 3pm-6pm in UTC which corresponds to 8am-11am in PDT
UTC to CEST call time
Best time for a conference call or a meeting is between 8am-4pm in UTC which corresponds to 10am-6pm in CEST
UTC to KST call time
Best time for a conference call or a meeting is between 8am-10am in UTC which corresponds to 5pm-7pm in KST
UTC to EST call time
Best time for a conference call or a meeting is between 1pm-6pm in UTC which corresponds to 8am-1pm in EST

11:00 pm23:00 Universal Time Coordinated (UTC). Offset UTC 0:00 hours
4:00 pm16:00 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
1:00 am01:00 Central European Summer Time (CEST). Offset UTC +2:00 hours
8:00 am08:00 Korea Standard Time (KST). Offset UTC +9:00 hours
7:00 pm19:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours

11:00 pm23:00 UTC / 4:00 pm16:00 PDT / 1:00 am01:00 CEST / 8:00 am08:00 KST / 7:00 pm19:00 EDT

UTC PDT CEST KST EDT
12am (midnight) 5pm 2am 9am 8pm
1am 6pm 3am 10am 9pm
2am 7pm 4am 11am 10pm
3am 8pm 5am 12pm (noon) 11pm
4am 9pm 6am 1pm 12am (midnight)
5am 10pm 7am 2pm 1am
6am 11pm 8am 3pm 2am
7am 12am (midnight) 9am 4pm 3am
8am 1am 10am 5pm 4am
9am 2am 11am 6pm 5am
10am 3am 12pm (noon) 7pm 6am
11am 4am 1pm 8pm 7am
12pm (noon) 5am 2pm 9pm 8am
1pm 6am 3pm 10pm 9am
2pm 7am 4pm 11pm 10am
3pm 8am 5pm 12am (midnight) 11am
4pm 9am 6pm 1am 12pm (noon)
5pm 10am 7pm 2am 1pm
6pm 11am 8pm 3am 2pm
7pm 12pm (noon) 9pm 4am 3pm
8pm 1pm 10pm 5am 4pm
9pm 2pm 11pm 6am 5pm
10pm 3pm 12am (midnight) 7am 6pm
11pm 4pm 1am 8am 7pm
0:00 17:00 2:00 9:00 20:00
1:00 18:00 3:00 10:00 21:00
2:00 19:00 4:00 11:00 22:00
3:00 20:00 5:00 12:00 23:00
4:00 21:00 6:00 13:00 0:00
5:00 22:00 7:00 14:00 1:00
6:00 23:00 8:00 15:00 2:00
7:00 0:00 9:00 16:00 3:00
8:00 1:00 10:00 17:00 4:00
9:00 2:00 11:00 18:00 5:00
10:00 3:00 12:00 19:00 6:00
11:00 4:00 13:00 20:00 7:00
12:00 5:00 14:00 21:00 8:00
13:00 6:00 15:00 22:00 9:00
14:00 7:00 16:00 23:00 10:00
15:00 8:00 17:00 0:00 11:00
16:00 9:00 18:00 1:00 12:00
17:00 10:00 19:00 2:00 13:00
18:00 11:00 20:00 3:00 14:00
19:00 12:00 21:00 4:00 15:00
20:00 13:00 22:00 5:00 16:00
21:00 14:00 23:00 6:00 17:00
22:00 15:00 0:00 7:00 18:00
23:00 16:00 1:00 8:00 19:00

Universal Time Coordinated

Offset: UTC is 0 hours ahead Greenwich Mean Time (GMT) and is used in Universal

Coordinated Universal Time (UTC) is the world time standard that regulates clocks and time. It is successor to Greenwich Mean Time (GMT). For casual use, UTC is the same as GMT, but is used by the scientific community.
UTC is the time standard commonly used across the world since 1972. It is used in many technical fields, like aviation industry and meteorologists, also used to synchronize time across internet networks.

UTC 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 zero hour and zero minutes time differences of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Zulu - Military abbreviation for UTC
  • Z - short form of 'Zulu'
IANA/Olson: Reflects UTC time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Etc/UCT
  • Etc/UTC
  • Etc/Universal
  • Etc/Zulu
  • UCT
  • UTC
  • Universal
  • Zulu
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
  • AST - Azores Summer Time

Pacific Daylight Time

Offset: PDT is 7 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries: It is used in following countries: Canada, Mexico, United States

Principal Cities: The largest city in the PDT timezone is Los Angeles from USA with population about 3.793 million people. Other major cities in the area are Vancouver, Tijuana, San Diego, San Jose

Daylight Saving: Pacific Daylight Time (PDT) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Pacific Standard Time (PST).

Start: Pacific Daylight Time (PDT) starts annually on the same date and time. and clocks were set one hour forward on Sunday, 14 March 2021, at 2:00 (2:00 am) local time.

End: Pacific Daylight Time (PDT) ends annually on the same date and time. and clocks are set one hour back on Sunday, 07 November 2021, at 2:00 (2:00 am) local time.

French: HAP - Heure Avancée du Pacifique

Spanish: PT - Zona Noroeste

PDT Time Zone Geo Map
PDT timezone map

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 seven hour and zero minutes time differences 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

Central European Summer Time

Offset: CEST is 2 hours ahead Greenwich Mean Time (GMT) and is used in Europe

Countries: It is used in following countries: Andorra, Albania, Austria, Bosnia & Herzegovina, Belgium, Switzerland, Czech Republic, Germany, Denmark, Spain, France, Gibraltar, Croatia, Hungary, Italy, Liechtenstein, Luxembourg, Monaco, Montenegro, North Macedonia, Malta, Netherlands, Norway, Poland, Serbia, Sweden, Slovenia, Svalbard & Jan Mayen, Slovakia, San Marino, Vatican City

Principal Cities: The largest city in the CEST timezone is Berlin from Germany with population about 3.426 million people. Other major cities in the area are Madrid, Rome, Paris, Budapest

Daylight Saving: Central European Summer Time (CEST) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Central European Time (CET).

Start: Central European Summer Time (CEST) starts annually on the same date and time. and clocks were set one hour forward on Sunday, 28 March 2021, at 2:00 (2:00 am) local time.

End: Central European Summer Time (CEST) ends annually on the same date and time. and clocks are set one hour back on Sunday, 31 October 2021, at 3:00 (3:00 am) local time.

German: MESZ - Mitteleuropäische Sommerzeit

CEST Time Zone Geo Map
CEST timezone map

CEST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +02 - basic short
  • +0200 - basic
  • +02:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0200 - sign character (+) followed by a four digit time providing hours (02) and minutes (00) of the offset. Indicates two hour and zero minutes time differences to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Bravo - Military abbreviation for CEST
  • B - short form of 'Bravo'
IANA/Olson: Reflects CEST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Africa/Ceuta
  • 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
  • Poland
Time zones with the GMT +2 offset:
  • CEST - Central European Summer Time
  • EET - Eastern European Time
  • MESZ - Mitteleuropäische Sommerzeit
  • B - Bravo Time Zone
  • CAT - Central Africa Time
  • IST - Israel Standard Time
  • SAST - South Africa Standard Time
  • WAST - West Africa Summer Time

Korea Standard Time

Offset: KST is 9 hours ahead Greenwich Mean Time (GMT) and is used in Asia

Countries: It is used in following countries: Korea (North), Korea (South)

Principal Cities: The largest city in the KST timezone is Seoul from South Korea with population about 10.349 million people. Other major cities in the area are Busan, Pyongyang, Incheon, Daegu

Daylight Saving: Korea Standard Time (KST) is not adjusted for daylight saving therefore KST remains the same through out the year. This means, unlike some time zones where the clock is set forward by one hour every summer and backward by one hour during winter to adjust for daylight saving, Korea Standard Time remains the same

KST Time Zone Geo Map
KST timezone map

KST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +09 - basic short
  • +0900 - basic
  • +09:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0900 - sign character (+) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates nine hour and zero minutes time differences to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • India - Military abbreviation for KST
  • I - short form of 'India'
IANA/Olson: Reflects KST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Pyongyang
  • Asia/Seoul
  • ROK
KST Abbreviation: Several time zones share KST abbreviation and it could refer to these time zones
  • Korea Standard Time - UTC +9
  • Pyongyang Time - UTC +8:30
Time zones with the GMT +9 offset:
  • AWDT - Australian Western Daylight Time
  • CHOST - Choibalsan Summer Time
  • I - India Time Zone
  • IRKST - Irkutsk Summer Time
  • JST - Japan Standard Time
  • KST - Korea Standard Time
  • PWT - Palau Time
  • TLT - East Timor Time
  • ULAST - Ulaanbaatar Summer Time
  • WIT - Eastern Indonesian Time
  • YAKT - Yakutsk Time
  • YST - Yakutsk Standard Time
  • ETT - East Timor Time
  • +09 -
  • PT - Palau Time

Eastern Standard Time

Offset: EST is 5 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries: It is used in following countries: Bahamas, Canada, Haiti, Jamaica, Cayman Islands, Mexico, Panama, Turks & Caicos Is, United States

Principal Cities: The largest city in the EST timezone is New York City from USA with population about 8.175 million people. Other major cities in the area are Toronto, Montreal, Brooklyn, Borough of Queens

Daylight Saving: This is a standard timezone, however during summer some places adjust time for one hour forward for daylight saving and observe Eastern Daylight Time (EDT).

End: EST ends annually on the same date and time. and clocks were set one hour forward on Sunday, 14 March 2021, at 2:00 (2:00 am) local time.

Start: EST starts annually on the same date and time. and clocks are set one hour back on Sunday, 07 November 2021, at 2:00 (2:00 am) local time.

French: HNE - Heure Normale de l'Est

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

EST Time Zone Geo Map
EST timezone map

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 five hour and zero minutes time differences 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
  • ET - Ecuador Time
  • PST - Peru Standard Time
  • CST - Colombia Standard Time
  • AST - Acre Standard Time
  • -05 -