NDT to AST to EST to PDT to MST to CST Time Converter

Updating current time…
NST/NDT
Newfoundland Standard Time
UTC−3:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Newfoundland Time is on standard time: NST (UTC−3:30) until Sun, Mar 14, 2027.
Keep NDT (UTC−2:30)
AST
Atlantic Standard Time
UTC−4
30m behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm
EST
Eastern Standard Time
UTC−5
1h 30m behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm
PST/PDT
Pacific Standard Time
UTC−8
4h 30m behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Pacific Time is on standard time: PST (UTC−8) until Sun, Mar 14, 2027.
Keep PDT (UTC−7)
MST
Mountain Standard Time
UTC−7
3h 30m behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CST
Central Standard Time
UTC−6
2h 30m behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

8:30 am08:30 NST (UTC-3:30), Nov 15, 2026 = 8:00 am08:00 AST (UTC-4), Nov 15, 2026 = 7:00 am07:00 EST (UTC-5), Nov 15, 2026 = 4:00 am04:00 PST (UTC-8), Nov 15, 2026 = 5:00 am05:00 MST (UTC-7), Nov 15, 2026 = 6:00 am06:00 CST (UTC-6), Nov 15, 2026

NST is 30 minutes ahead of AST. NST is 1 hour and 30 minutes ahead of EST. NST is 4 hours and 30 minutes ahead of PST. NST is 3 hours and 30 minutes ahead of MST. NST is 2 hours and 30 minutes ahead of CST.

How the time difference changes

NDT to AST

For most of the year, NDT is 30 minutes ahead of ADT. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, NST is 30 minutes ahead of AST. Briefly around clock changes, NDT is 1 hour and 30 minutes ahead of AST or NST is 30 minutes behind ADT.

For most of the year, working hours of 9:00 am to 6:00 pm in NDT correspond to 8:30 am to 5:30 pm in ADT. At other times of the year, working hours of 9:00 am to 6:00 pm in NST correspond to 8:30 am to 5:30 pm in AST.For most of the year, working hours of 09:00 to 18:00 in NDT correspond to 08:30 to 17:30 in ADT. At other times of the year, working hours of 09:00 to 18:00 in NST correspond to 08:30 to 17:30 in AST.

NDT to EST

For most of the year, NDT is 1 hour and 30 minutes ahead of EDT. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, NST is 1 hour and 30 minutes ahead of EST. Briefly around clock changes, NDT is 2 hours and 30 minutes ahead of EST or NST is 30 minutes ahead of EDT.

For most of the year, working hours of 9:00 am to 6:00 pm in NDT correspond to 7:30 am to 4:30 pm in EDT. At other times of the year, working hours of 9:00 am to 6:00 pm in NST correspond to 7:30 am to 4:30 pm in EST.For most of the year, working hours of 09:00 to 18:00 in NDT correspond to 07:30 to 16:30 in EDT. At other times of the year, working hours of 09:00 to 18:00 in NST correspond to 07:30 to 16:30 in EST.

NDT to PDT

For most of the year, NDT is 4 hours and 30 minutes ahead of PDT. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, NST is 4 hours and 30 minutes ahead of PST. Briefly around clock changes, NDT is 5 hours and 30 minutes ahead of PST or NST is 3 hours and 30 minutes ahead of PDT.

For most of the year, working hours of 9:00 am to 6:00 pm in NDT correspond to 4:30 am to 1:30 pm in PDT. At other times of the year, working hours of 9:00 am to 6:00 pm in NST correspond to 4:30 am to 1:30 pm in PST.For most of the year, working hours of 09:00 to 18:00 in NDT correspond to 04:30 to 13:30 in PDT. At other times of the year, working hours of 09:00 to 18:00 in NST correspond to 04:30 to 13:30 in PST.

NDT to MST

For most of the year, NDT is 3 hours and 30 minutes ahead of MDT. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, NST is 3 hours and 30 minutes ahead of MST. Briefly around clock changes, NDT is 4 hours and 30 minutes ahead of MST or NST is 2 hours and 30 minutes ahead of MDT.

For most of the year, working hours of 9:00 am to 6:00 pm in NDT correspond to 5:30 am to 2:30 pm in MDT. At other times of the year, working hours of 9:00 am to 6:00 pm in NST correspond to 5:30 am to 2:30 pm in MST.For most of the year, working hours of 09:00 to 18:00 in NDT correspond to 05:30 to 14:30 in MDT. At other times of the year, working hours of 09:00 to 18:00 in NST correspond to 05:30 to 14:30 in MST.

NDT to CST

For most of the year, NDT is 2 hours and 30 minutes ahead of CDT. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, NST is 2 hours and 30 minutes ahead of CST. Briefly around clock changes, NDT is 3 hours and 30 minutes ahead of CST or NST is 1 hour and 30 minutes ahead of CDT.

For most of the year, working hours of 9:00 am to 6:00 pm in NDT correspond to 6:30 am to 3:30 pm in CDT. At other times of the year, working hours of 9:00 am to 6:00 pm in NST correspond to 6:30 am to 3:30 pm in CST.For most of the year, working hours of 09:00 to 18:00 in NDT correspond to 06:30 to 15:30 in CDT. At other times of the year, working hours of 09:00 to 18:00 in NST correspond to 06:30 to 15:30 in CST.

Compare NDT time with AST, EST, PDT, MST, and CST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Newfoundland Standard Time is 30 minutes ahead of Atlantic Standard Time. Newfoundland Standard Time is 1 hour and 30 minutes ahead of Eastern Standard Time. Newfoundland Standard Time is 4 hours and 30 minutes ahead of Pacific Standard Time. Newfoundland Standard Time is 3 hours and 30 minutes ahead of Mountain Standard Time. Newfoundland Standard Time is 2 hours and 30 minutes ahead of Central Standard Time.
8:30 am08:30 in NST is 8:00 am08:00 in AST and is 7:00 am07:00 in EST and is 4:00 am04:00 in PST and is 5:00 am05:00 in MST and is 6:00 am06:00 in CST

NST to AST call time
Best time for a conference call or a meeting is between 9:30am-6pm09:30-18:00 in NST which corresponds to 9am-5:30pm09:00-17:30 in AST.
NST to EST call time
Best time for a conference call or a meeting is between 10:30am-6pm10:30-18:00 in NST which corresponds to 9am-4:30pm09:00-16:30 in EST.
NST to PST call time
Best time for a conference call or a meeting is between 1:30pm-6pm13:30-18:00 in NST which corresponds to 9am-1:30pm09:00-13:30 in PST.
NST to MST call time
Best time for a conference call or a meeting is between 12:30pm-6pm12:30-18:00 in NST which corresponds to 9am-2:30pm09:00-14:30 in MST.
NST to CST call time
Best time for a conference call or a meeting is between 11:30am-6pm11:30-18:00 in NST which corresponds to 9am-3:30pm09:00-15:30 in CST.

8:30 am08:30 Newfoundland Standard Time (NST). Offset UTC -3:30 hours
8:00 am08:00 Atlantic Standard Time (AST). Offset UTC -4:00 hours
7:00 am07:00 Eastern Standard Time (EST). Offset UTC -5:00 hours
4:00 am04:00 Pacific Standard Time (PST). Offset UTC -8:00 hours
5:00 am05:00 Mountain Standard Time (MST). Offset UTC -7:00 hours
6:00 am06:00 Central Standard Time (CST). Offset UTC -6:00 hours

8:30 am08:30 NST / 8:00 am08:00 AST / 7:00 am07:00 EST / 4:00 am04:00 PST / 5:00 am05:00 MST / 6:00 am06:00 CST

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
NSTASTESTPSTMSTCST
11:30pm previous day10:30pm previous day7:30pm previous day8:30pm previous day9:30pm previous day
12:30am11:30pm previous day8:30pm previous day9:30pm previous day10:30pm previous day
1:30am12:30am9:30pm previous day10:30pm previous day11:30pm previous day
2:30am1:30am10:30pm previous day11:30pm previous day12:30am
3:30am2:30am11:30pm previous day12:30am1:30am
4:30am3:30am12:30am1:30am2:30am
5:30am4:30am1:30am2:30am3:30am
6:30am5:30am2:30am3:30am4:30am
7:30am6:30am3:30am4:30am5:30am
8:30am7:30am4:30am5:30am6:30am
9:30am8:30am5:30am6:30am7:30am
10:30am9:30am6:30am7:30am8:30am
11:30am10:30am7:30am8:30am9:30am
12:30pm11:30am8:30am9:30am10:30am
1:30pm12:30pm9:30am10:30am11:30am
2:30pm1:30pm10:30am11:30am12:30pm
3:30pm2:30pm11:30am12:30pm1:30pm
4:30pm3:30pm12:30pm1:30pm2:30pm
5:30pm4:30pm1:30pm2:30pm3:30pm
6:30pm5:30pm2:30pm3:30pm4:30pm
7:30pm6:30pm3:30pm4:30pm5:30pm
8:30pm7:30pm4:30pm5:30pm6:30pm
9:30pm8:30pm5:30pm6:30pm7:30pm
10:30pm9:30pm6:30pm7:30pm8:30pm
23:30 previous day22:30 previous day19:30 previous day20:30 previous day21:30 previous day
00:3023:30 previous day20:30 previous day21:30 previous day22:30 previous day
01:3000:3021:30 previous day22:30 previous day23:30 previous day
02:3001:3022:30 previous day23:30 previous day00:30
03:3002:3023:30 previous day00:3001:30
04:3003:3000:3001:3002:30
05:3004:3001:3002:3003:30
06:3005:3002:3003:3004:30
07:3006:3003:3004:3005:30
08:3007:3004:3005:3006:30
09:3008:3005:3006:3007:30
10:3009:3006:3007:3008:30
11:3010:3007:3008:3009:30
12:3011:3008:3009:3010:30
13:3012:3009:3010:3011:30
14:3013:3010:3011:3012:30
15:3014:3011:3012:3013:30
16:3015:3012:3013:3014:30
17:3016:3013:3014:3015:30
18:3017:3014:3015:3016:30
19:3018:3015:3016:3017:30
20:3019:3016:3017:3018:30
21:3020:3017:3018:3019:30
22:3021:3018:3019:3020:30

Newfoundland Daylight Time

Offset: NDT is 2 hours and 30 minutes behind Greenwich Mean Time (GMT).

Countries using this time zone: Canada

Principal Cities: The largest city in the NDT time zone is St. John's in Canada, with about 110,525 people. Other major cities in this time zone include Corner Brook, Grand Falls-Windsor, Gander, Clarenville.

French: HAT - Heure Avancée de Terre-Neuve

Map of the areas on Newfoundland Daylight Time (NDT)
NDT part of the year

Today the shaded areas are on UTC−3:30 (NST).

Open the world time zone map© OpenStreetMap

Daylight Saving: Newfoundland Daylight Time (NDT) is a daylight saving/summer time zone, but some places set clocks back one hour during winter and observe Newfoundland Standard Time (NST).

123456789101112End: Newfoundland Daylight Time (NDT) ended on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were 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.

123456789101112Start: Newfoundland Daylight Time (NDT) starts on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00. Daylight saving starts annually on the second Sunday of March.

See Canada daylight saving time and upcoming clock changes worldwide.

NDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -0230 - basic
  • -02:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0230 - sign character (-) followed by a four digit time providing hours (02) and minutes (30) of the offset. Indicates an offset of two hours and thirty minutes to the west of the zero meridian.
IANA/Olson: Reflects NDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/St_Johns
  • Canada/Newfoundland

Atlantic Standard Time

Offset: AST is 4 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Anguilla, Antigua and Barbuda, Aruba, Barbados, Bermuda, British Virgin Islands, Canada, Caribbean Netherlands, Curaçao, Dominica, Dominican Republic, Greenland, Grenada, Guadeloupe, Martinique, Montserrat, Puerto Rico, Saint Barthélemy, Saint Kitts and Nevis, Saint Lucia, Saint Martin, Saint Vincent and the Grenadines, Sint Maarten, Trinidad and Tobago, US Virgin Islands

Principal Cities: The largest city in the AST time zone is Santo Domingo in the Dominican Republic, with about 2.202 million people. Other major cities in this time zone include Santiago de los Caballeros, Halifax, San Juan, San Pedro de Macorís.

French: HNA - Heure Normale de l'Atlantique

Spanish: AST - Tiempo Estándar del Atlántico

Map of the areas on Atlantic Standard Time (AST)
AST all year AST part of the year

Today all shaded areas are on AST.

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 Atlantic Daylight Time (ADT).

123456789101112Start: Atlantic Standard Time (AST) started on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

123456789101112End: Atlantic Standard Time (AST) ends on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.

See Canada daylight saving time and upcoming clock changes worldwide.

AST 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 west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Quebec - Military abbreviation for AST
  • Q - short form of 'Quebec'
IANA/Olson: Reflects AST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Anguilla
  • America/Antigua
  • America/Aruba
  • America/Barbados
  • America/Blanc-Sablon
  • America/Curacao
  • America/Dominica
  • America/Glace_Bay
  • America/Goose_Bay
  • America/Grenada
  • America/Guadeloupe
  • America/Halifax
  • America/Kralendijk
  • America/Lower_Princes
  • America/Marigot
  • America/Martinique
  • America/Moncton
  • America/Montserrat
  • America/Port_of_Spain
  • America/Puerto_Rico
  • America/Santo_Domingo
  • America/St_Barthelemy
  • America/St_Kitts
  • America/St_Lucia
  • America/St_Thomas
  • America/St_Vincent
  • America/Thule
  • America/Tortola
  • America/Virgin
  • Atlantic/Bermuda
  • Canada/Atlantic
AST Abbreviation: Several time zones share AST abbreviation and it could refer to these time zones
  • Atlantic Standard Time - UTC -4
  • Arabia Standard Time - UTC +3
Time zones with the GMT -4 offset:
  • AST - Atlantic Standard Time
  • EDT - Eastern Daylight Time
  • AMT - Amazon Time
  • BOT - Bolivia Time
  • CDT - Cuba Daylight Time
  • CLT - Chile Standard Time
  • GYT - Guyana Time
  • HLV - Hora Legal de Venezuela
  • Q - Quebec Time Zone
  • VET - Venezuelan Standard Time

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 all shaded areas are on EST.

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).

123456789101112Start: Eastern Standard Time (EST) started on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

123456789101112End: Eastern Standard Time (EST) ends on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.

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

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 the shaded areas are on UTC−8 (Pacific Standard Time).

Open the world time zone map© OpenStreetMap

Daylight Saving: Pacific Daylight Time (PDT) is a daylight saving/summer time zone, but some places set clocks back one hour during winter and observe Pacific Standard Time (PST).

123456789101112End: Pacific Daylight Time (PDT) ended on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were 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.

123456789101112Start: Pacific Daylight Time (PDT) starts on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00. Daylight saving starts annually on the second Sunday of March.

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

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 all shaded areas are on MST.

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).

123456789101112Start: Mountain Standard Time (MST) started on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

123456789101112End: Mountain Standard Time (MST) ends on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.

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

Central Standard Time

Offset: CST is 6 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Belize, Canada, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, 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, Puebla, Santiago de Querétaro.

French: HNC - Heure Normale du Centre

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

Map of the areas on Central Standard Time (CST)
CST all year CST part of the year

Today all shaded areas are on CST.

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 Daylight Time (CDT).

123456789101112Start: Central Standard Time (CST) started on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

123456789101112End: Central Standard Time (CST) ends on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.

See USA daylight saving time and upcoming clock changes worldwide.

CST 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 CST
  • S - short form of 'Sierra'
IANA/Olson: Reflects CST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Bahia_Banderas
  • America/Belize
  • America/Chicago
  • America/Chihuahua
  • America/Costa_Rica
  • America/El_Salvador
  • America/Guatemala
  • America/Indiana/Knox
  • America/Indiana/Tell_City
  • America/Knox_IN
  • America/Managua
  • America/Matamoros
  • America/Menominee
  • America/Merida
  • America/Mexico_City
  • America/Monterrey
  • America/North_Dakota/Beulah
  • America/North_Dakota/Center
  • America/North_Dakota/New_Salem
  • America/Ojinaga
  • America/Rainy_River
  • America/Rankin_Inlet
  • America/Regina
  • America/Resolute
  • America/Swift_Current
  • America/Tegucigalpa
  • America/Winnipeg
  • CST6CDT
  • Canada/Central
  • Canada/Saskatchewan
  • Mexico/General
  • US/Central
  • US/Indiana-Starke
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 -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