UTC to HST to PST to MDT to CDT to EDT
Time Difference
Universal Time Coordinated is 10 hours ahead of Hawaii Standard Time and 7 hours ahead of Pacific Daylight Time and 6 hours ahead of Mountain Daylight Time and 5 hours ahead of Central Daylight Time and 4 hours ahead of Eastern Daylight Time
8:00 am08:00 in UTC is 10:00 pm22:00 in HST and is 1:00 am01:00 in PDT and is 2:00 am02:00 in MDT and is 3:00 am03:00 in CDT and is 4:00 am04:00 in EDT
UTC to HST call time
Best time for a conference call or a meeting is between 6pm-8pm in UTC which corresponds to 8am-10am in HST
UTC to PST call time
Best time for a conference call or a meeting is between 4pm-6pm in UTC which corresponds to 8am-10am in PST
UTC to MDT call time
Best time for a conference call or a meeting is between 2pm-6pm in UTC which corresponds to 8am-12pm in MDT
UTC to CDT call time
Best time for a conference call or a meeting is between 1pm-6pm in UTC which corresponds to 8am-1pm in CDT
UTC to EDT call time
Best time for a conference call or a meeting is between 12pm-6pm in UTC which corresponds to 8am-2pm in EDT
8:00 am08:00 Universal Time Coordinated (UTC). Offset UTC 0:00 hours
10:00 pm22:00 Hawaii Standard Time (HST). Offset UTC -10:00 hours
1:00 am01:00 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
2:00 am02:00 Mountain Daylight Time (MDT). Offset UTC -6:00 hours
3:00 am03:00 Central Daylight Time (CDT). Offset UTC -5:00 hours
4:00 am04:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
8:00 am08:00 UTC / 10:00 pm22:00 HST / 1:00 am01:00 PDT / 2:00 am02:00 MDT / 3:00 am03:00 CDT / 4:00 am04:00 EDT
| UTC | HST | PDT | MDT | CDT | EDT |
|---|---|---|---|---|---|
| 12am (midnight) | 2pm | 5pm | 6pm | 7pm | 8pm |
| 1am | 3pm | 6pm | 7pm | 8pm | 9pm |
| 2am | 4pm | 7pm | 8pm | 9pm | 10pm |
| 3am | 5pm | 8pm | 9pm | 10pm | 11pm |
| 4am | 6pm | 9pm | 10pm | 11pm | 12am (midnight) |
| 5am | 7pm | 10pm | 11pm | 12am (midnight) | 1am |
| 6am | 8pm | 11pm | 12am (midnight) | 1am | 2am |
| 7am | 9pm | 12am (midnight) | 1am | 2am | 3am |
| 8am | 10pm | 1am | 2am | 3am | 4am |
| 9am | 11pm | 2am | 3am | 4am | 5am |
| 10am | 12am (midnight) | 3am | 4am | 5am | 6am |
| 11am | 1am | 4am | 5am | 6am | 7am |
| 12pm (noon) | 2am | 5am | 6am | 7am | 8am |
| 1pm | 3am | 6am | 7am | 8am | 9am |
| 2pm | 4am | 7am | 8am | 9am | 10am |
| 3pm | 5am | 8am | 9am | 10am | 11am |
| 4pm | 6am | 9am | 10am | 11am | 12pm (noon) |
| 5pm | 7am | 10am | 11am | 12pm (noon) | 1pm |
| 6pm | 8am | 11am | 12pm (noon) | 1pm | 2pm |
| 7pm | 9am | 12pm (noon) | 1pm | 2pm | 3pm |
| 8pm | 10am | 1pm | 2pm | 3pm | 4pm |
| 9pm | 11am | 2pm | 3pm | 4pm | 5pm |
| 10pm | 12pm (noon) | 3pm | 4pm | 5pm | 6pm |
| 11pm | 1pm | 4pm | 5pm | 6pm | 7pm |
| 0:00 | 14:00 | 17:00 | 18:00 | 19:00 | 20:00 |
| 1:00 | 15:00 | 18:00 | 19:00 | 20:00 | 21:00 |
| 2:00 | 16:00 | 19:00 | 20:00 | 21:00 | 22:00 |
| 3:00 | 17:00 | 20:00 | 21:00 | 22:00 | 23:00 |
| 4:00 | 18:00 | 21:00 | 22:00 | 23:00 | 0:00 |
| 5:00 | 19:00 | 22:00 | 23:00 | 0:00 | 1:00 |
| 6:00 | 20:00 | 23:00 | 0:00 | 1:00 | 2:00 |
| 7:00 | 21:00 | 0:00 | 1:00 | 2:00 | 3:00 |
| 8:00 | 22:00 | 1:00 | 2:00 | 3:00 | 4:00 |
| 9:00 | 23:00 | 2:00 | 3:00 | 4:00 | 5:00 |
| 10:00 | 0:00 | 3:00 | 4:00 | 5:00 | 6:00 |
| 11:00 | 1:00 | 4:00 | 5:00 | 6:00 | 7:00 |
| 12:00 | 2:00 | 5:00 | 6:00 | 7:00 | 8:00 |
| 13:00 | 3:00 | 6:00 | 7:00 | 8:00 | 9:00 |
| 14:00 | 4:00 | 7:00 | 8:00 | 9:00 | 10:00 |
| 15:00 | 5:00 | 8:00 | 9:00 | 10:00 | 11:00 |
| 16:00 | 6:00 | 9:00 | 10:00 | 11:00 | 12:00 |
| 17:00 | 7:00 | 10:00 | 11:00 | 12:00 | 13:00 |
| 18:00 | 8:00 | 11:00 | 12:00 | 13:00 | 14:00 |
| 19:00 | 9:00 | 12:00 | 13:00 | 14:00 | 15:00 |
| 20:00 | 10:00 | 13:00 | 14:00 | 15:00 | 16:00 |
| 21:00 | 11:00 | 14:00 | 15:00 | 16:00 | 17:00 |
| 22:00 | 12:00 | 15:00 | 16:00 | 17:00 | 18:00 |
| 23:00 | 13:00 | 16:00 | 17:00 | 18:00 | 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
- 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 zero hour and zero minutes time differences of the zero meridian.
- Zulu - Military abbreviation for UTC
- Z - short form of 'Zulu'
- Etc/UCT
- Etc/UTC
- Etc/Universal
- Etc/Zulu
- UCT
- UTC
- Universal
- Zulu
- 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
Hawaii Standard Time
Offset: HST is 10 hours behind Greenwich Mean Time (GMT) and is used in Pacific
Countries: It is used in following countries: United States
Principal Cities: The largest city in the HST timezone is Honolulu from USA with population about 371,657 people. Other major cities in the area are Pearl City, Hilo, Kailua, Waipahu
Daylight Saving: Hawaii Standard Time (HST) is not adjusted for daylight saving therefore HST 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, Hawaii Standard Time remains the same
HST representations, usage and related time zones
- -10 - basic short
- -1000 - basic
- -10:00 - extended
- -1000 - sign character (-) followed by a four digit time providing hours (10) and minutes (00) of the offset. Indicates ten hour and zero minutes time differences to the west of the zero meridian.
- Whiskey - Military abbreviation for HST
- W - short form of 'Whiskey'
- America/Adak
- America/Atka
- HST
- Pacific/Honolulu
- Pacific/Johnston
- US/Aleutian
- US/Hawaii
- HAST - Hawaii-Aleutian Standard Time
- CKT - Cook Island Time
- HST - Hawaii Standard Time
- TAHT - Tahiti Time
- W - Whiskey Time Zone
Pacific Standard Time
Offset: PST is 8 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 PST 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
French: HNP - Heure Normale du Pacifique
Spanish: PT - Tiempo del Pacífico, PT - Zona Noroeste
Daylight Saving: This is a standard time zone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Pacific Daylight Time (PDT).
End: Pacific Standard Time (PST) has ended on Sunday, March 9, 2025 at 2:00 am local time and clocks were set one hour forward to Sunday, March 9, 2025, 3:00 am local daylight time instead. Standard time ends annually the on second Sunday of March.
Start: Pacific Standard Time (PST) starts on Sunday, November 2, 2025 at 2:00 am local time and clocks are set one hour back to Sunday, November 2, 2025, 1:00 am. Standard time starts annually the on first Sunday of November.
PST 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 eight hour and zero minutes time differences to the west of the zero meridian.
- Uniform - Military abbreviation for PST
- U - short form of 'Uniform'
- America/Ensenada
- America/Los_Angeles
- America/Santa_Isabel
- America/Tijuana
- America/Vancouver
- Canada/Pacific
- Mexico/BajaNorte
- PST8PDT
- US/Pacific
- Pacific Standard Time - UTC -8
- Pitcairn Standard Time - UTC -8
- Peru Standard Time - UTC -5
- 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: It is used in following countries: Canada, Mexico, United States
Principal Cities: The largest city in the MDT timezone is Calgary from Canada with population about 1.02 million people. Other major cities in the area are Edmonton, El Paso, Denver, Albuquerque
French: HAR - Heure Avancée des Rocheuses
Spanish: MT - Zona Pacífico
Daylight Saving: Mountain Daylight Time (MDT) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Mountain Standard Time (MST).
Start: Mountain Daylight Time (MDT) started on Sunday, March 9, 2025 at 2:00 am local time and clocks were set one hour forward to Sunday, March 9, 2025, 3:00 am. Daylight saving starts annually the on second Sunday of March
End: Mountain Daylight Time (MDT) ends on Sunday, November 2, 2025 at 2:00 am local time and clocks are set one hour back to Sunday, November 2, 2025, 1:00 am local standard time instead. Daylight saving ends annually the on 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 six hour and zero minutes time differences 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 Daylight Time
Offset: CDT is 5 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries: It is used in following countries: Canada, Cuba, Mexico, United States
Principal Cities: The largest city in the CDT timezone is Chicago from USA with population about 2.696 million people. Other major cities in the area are Havana, Houston, Ciudad Juarez, San Antonio
French: HAC - Heure Avancée du Centre
Spanish: CT - Zona Centro
Daylight Saving: Central Daylight Time (CDT) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Central Standard Time (CST).
Start: Central Daylight Time (CDT) started on Sunday, March 9, 2025 at 2:00 am local time and clocks were set one hour forward to Sunday, March 9, 2025, 3:00 am. Daylight saving starts annually the on second Sunday of March
End: Central Daylight Time (CDT) ends on Sunday, November 2, 2025 at 2:00 am local time and clocks are set one hour back to Sunday, November 2, 2025, 1:00 am local standard time instead. Daylight saving ends annually the on first Sunday of November
CDT 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 five hour and zero minutes time differences to the west of the zero meridian.
- Romeo - Military abbreviation for CDT
- R - short form of 'Romeo'
- 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
- Central Daylight Time - UTC -5
- Cuba Daylight Time - UTC -4
- 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
Eastern Daylight Time
Offset: EDT is 4 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries: It is used in following countries: Bahamas, Canada, Haiti, Turks & Caicos Is, United States
Principal Cities: The largest city in the EDT 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
French: HAE - Heure Avancée de l'Est
Spanish: EDT - Tiempo de verano del Este, ET - Zona Sureste
Daylight Saving: Eastern Daylight Time (EDT) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Eastern Standard Time (EST).
Start: Eastern Daylight Time (EDT) started on Sunday, March 9, 2025 at 2:00 am local time and clocks were set one hour forward to Sunday, March 9, 2025, 3:00 am. Daylight saving starts annually the on second Sunday of March
End: Eastern Daylight Time (EDT) ends on Sunday, November 2, 2025 at 2:00 am local time and clocks are set one hour back to Sunday, November 2, 2025, 1:00 am local standard time instead. Daylight saving ends annually the on first Sunday of November
EDT representations, usage and related time zones
- -04 - basic short
- -0400 - basic
- -04:00 - extended
- -0400 - sign character (-) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates four hour and zero minutes time differences to the west of the zero meridian.
- Quebec - Military abbreviation for EDT
- Q - short form of 'Quebec'
- 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/Kentucky/Louisville
- America/Kentucky/Monticello
- America/Louisville
- America/Montreal
- America/Nassau
- America/New_York
- America/Nipigon
- America/Pangnirtung
- America/Port-au-Prince
- America/Thunder_Bay
- America/Toronto
- Canada/Eastern
- EST5EDT
- US/East-Indiana
- US/Eastern
- US/Michigan
- AST - Atlantic Standard Time
- EDT - Eastern Daylight Time
- AMT - Amazon Time
- BOT - Bolivia Time
- CDT - Cuba Daylight Time
- CLT - Chile Standard Time
- FKT - Falkland Island Time
- GYT - Guyana Time
- HLV - Hora Legal de Venezuela
- PYT - Paraguay Time
- Q - Quebec Time Zone
- VET - Venezuelan Standard Time