Updating current time…
Trinidad and TobagoAST
UTC−4
12am
3am
6am
9am
12pm
3pm
6pm
9pm
MDT
UTC−6
2h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

8:00 am08:00 AST (UTC-4), Oct 17, 2026 = 6:00 am06:00 MDT (UTC-6), Oct 17, 2026

Port of Spain is 2 hours ahead of MDT.

How the time difference changes

For most of the year, Port of Spain is 2 hours ahead of MDT. From Nov 1, 2026 to Mar 14, 2027, Port of Spain is 3 hours ahead of MST.

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

Compare Port of Spain time with MDT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

AST (Atlantic Standard Time) is 2 hours ahead of Mountain Daylight Time.
8:00 am08:00 in Port of Spain, Trinidad and Tobago is 6:00 am06:00 in MDT

Port of Spain to MDT call time
Best time for a conference call or a meeting is between 11am-6pm11:00-18:00 in Port of Spain which corresponds to 9am-4pm09:00-16:00 in MDT

8:00 am08:00 AST (Atlantic Standard Time) (Port of Spain, Trinidad and Tobago). Offset UTC -4:00 hours
6:00 am06:00 Mountain Daylight Time (MDT). Offset UTC -6:00 hours

8:00 am08:00 Port of Spain, Trinidad and Tobago / 6:00 am06:00 MDT

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Hourly time comparison
Port of Spain, Trinidad and TobagoMDT
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Port of Spain Time Zone and Facts

Time Zone

Abbreviation / Offset
AST – Atlantic Standard Time, UTC-4 (no daylight saving time)

Port of Spain Facts

Country
Trinidad and Tobago
Alternative Names
Acalquixohuayan Caxtillan, City of Port-of-Spain, POS, Po of Espay, Port of Spain, Port of Spein, Port of Speinas, Port of Spejn, Port of Speyn, Port oph Spein, Port ov Spejn, Port uf Spejn, Port-Of-Spejn, Port-au-Spain, Port-d'Espagne, Port-of-Spain, Port-of-Spein, Port-of-Spejn, Port-of-speyn, Porto Espana, Porto España, Portofspeina, Portospeno, Portu de Spania, Puerto Espana, Puerto España, Pò of Espay, bwrt awf sbyn, phxrt-xxf-spen, porata afa sapena, port ahp speyn, porta aba spena, porta opha spena, poteu obeu seupein, poteuobeuseupein, potoobusupein, prt aw aspayn, xi ban ya gang, Πορτ οφ Σπέιν, Πορτ-οφ-Σπέιν, Порт ов Спејн, Порт оф Спейн, Порт оф Спејн, Порт ъф Спейн, Порт-Оф-Спейн, Порт-оф-Спейн, פורט אוף ספיין, بورت أوف سبين, پرت آو اسپاین, پورٹ آف اسپین, पोर्ट ऑफ स्पेन, পোর্ট অব স্পেন, ਪੋਰਟ ਆਫ਼ ਸਪੇਨ, போர்ட் ஆஃப் ஸ்பெய்ன், പോർട്ട് ഓഫ് സ്പെയിൻ, พอร์ต-ออฟ-สเปน, པོ་རོ་ཊི་ཨོཕ་སི་པེ་ན།, პორტ-ოვ-სპეინი, ፖርት ኦፍ ስፔን, ポートオブスペイン, 西班牙港, 포트 오브 스페인, 포트오브스페인
Population
49,031
Currency
Dollar (TTD)
Geographic Coordinates
10° 40' N Latitude / 61° 31' W Longitude

Mountain Daylight Time

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

Countries using this time zone: Canada, Mexico, United States

Principal Cities: The largest city in the MDT time zone is Ciudad Juárez in Mexico, with about 1.512 million people. Other major cities in this time zone include Denver, El Paso, Albuquerque, Colorado Springs.

French: HAR - Heure Avancée des Rocheuses

Spanish: MT - Zona Pacífico

Map of the areas on Mountain Daylight Time (MDT)
MDT part of the year

Today all shaded areas are on MDT.

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).

123456789101112Start: 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.

123456789101112End: 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.

See USA daylight saving time and upcoming clock changes worldwide.

MDT 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 MDT
  • S - short form of 'Sierra'
IANA/Olson: Reflects MDT 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/Denver
  • America/Edmonton
  • America/Inuvik
  • America/Shiprock
  • America/Yellowknife
  • Canada/Mountain
  • MST7MDT
  • Navajo
  • US/Mountain
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