AST/ADT
Atlantic Standard Time
GMT -4
ADT automatically adjusted to AST time zone, that is in use
Trinidad and Tobago
AST

Time Difference

Atlantic Standard Time is 0 hours ahead of AST (Atlantic Standard Time)
3:30 pm15:30 in AST is 3:30 pm15:30 in Port of Spain, Trinidad and Tobago

ADT to Port of Spain call time
Best time for a conference call or a meeting is between 9am-6pm in ADT which corresponds to 8am-5pm in Port of Spain

3:30 pm15:30 Atlantic Standard Time (AST). Offset UTC -4:00 hours
3:30 pm15:30 AST (Atlantic Standard Time) (Port of Spain, Trinidad and Tobago). Offset UTC -4:00 hours

3:30 pm15:30 AST / 3:30 pm15:30 Port of Spain, Trinidad and Tobago

AST Port of Spain, Trinidad and Tobago
12am (midnight) 12am (midnight)
1am 1am
2am 2am
3am 3am
4am 4am
5am 5am
6am 6am
7am 7am
8am 8am
9am 9am
10am 10am
11am 11am
12pm (noon) 12pm (noon)
1pm 1pm
2pm 2pm
3pm 3pm
4pm 4pm
5pm 5pm
6pm 6pm
7pm 7pm
8pm 8pm
9pm 9pm
10pm 10pm
11pm 11pm
0:00 0:00
1:00 1:00
2:00 2:00
3:00 3:00
4:00 4:00
5:00 5:00
6:00 6:00
7:00 7:00
8:00 8:00
9:00 9:00
10:00 10:00
11:00 11:00
12:00 12:00
13:00 13:00
14:00 14:00
15:00 15:00
16:00 16:00
17:00 17:00
18:00 18:00
19:00 19:00
20:00 20:00
21:00 21:00
22:00 22:00
23:00 23:00

Atlantic Daylight Time

Offset: ADT is 3 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries: It is used in following countries: Bermuda, Canada, Greenland

Principal Cities: The largest city in the ADT timezone is Halifax from Canada with population about 359,111 people. Other major cities in the area are Sydney, Dartmouth, Saint John, Moncton

French: HAA - Heure Avancée de l'Atlantique

ADT Time Zone Geo Map
ADT timezone map

Daylight Saving: Atlantic Daylight Time (ADT) is a daylight saving/summer time zone, however during winter some places adjust time for one hour back and observe Atlantic Standard Time (AST).

Daylight saving time clock moves back for one hour from 2am to 1amEnd: Atlantic Daylight Time (ADT) has ended on Sunday, November 3, 2024 at 2:00 am local time and clocks were set one hour back to Sunday, November 3, 2024, 1:00 am local standard time instead. Daylight saving ends annually the on first Sunday of November

Daylight saving time clock moves forward for one hour from 2am to 3amStart: Atlantic Daylight Time (ADT) starts on Sunday, March 9, 2025 at 2:00 am local time and clocks are set one hour forward to Sunday, March 9, 2025, 3:00 am. Daylight saving starts annually the on second Sunday of March

ADT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -03 - basic short
  • -0300 - basic
  • -03:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0300 - sign character (-) followed by a four digit time providing hours (03) and minutes (00) of the offset. Indicates three 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
  • Papa - Military abbreviation for ADT
  • P - short form of 'Papa'
IANA/Olson: Reflects ADT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Glace_Bay
  • America/Goose_Bay
  • America/Halifax
  • America/Moncton
  • America/Thule
  • Atlantic/Bermuda
  • Canada/Atlantic
ADT Abbreviation: Several time zones share ADT abbreviation and it could refer to these time zones
  • Atlantic Daylight Time - UTC -3
  • Arabian Daylight Time - UTC +4
Time zones with the GMT -3 offset:
  • ADT - Atlantic Daylight Time
  • PMT - Pierre & Miquelon Standard Time
  • PMST - Pierre & Miquelon Standard Time
  • WGT - West Greenland Time
  • AMST - Amazon Summer Time
  • ART - Argentina Time
  • BRT - Brasília time
  • CLST - Chile Summer Time
  • FKST - Falkland Islands Summer Time
  • GFT - French Guiana Time
  • P - Papa Time Zone
  • PYST - Paraguay Summer Time
  • SRT - Suriname Time
  • UYT - Uruguay Time

Port of Spain Information

Time Zone

Abbreviation / Name
AST - Atlantic Standard Time
UTC / GMT Offset
-4:00 hours during Atlantic Standard Time, currently in use.

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