Updating current time…
Dominican RepublicAST
UTC−4
12am
3am
6am
9am
12pm
3pm
6pm
9pm
ADT
UTC−3
1h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

8:00 am08:00 AST (UTC-4), Oct 17, 2026 = 9:00 am09:00 ADT (UTC-3), Oct 17, 2026

Santiago de los Caballeros is 1 hour behind ADT.

How the time difference changes

For most of the year, Santiago de los Caballeros is 1 hour behind ADT. From Nov 1, 2026 to Mar 14, 2027, Santiago de los Caballeros and AST have the same time.

For most of the year, working hours of 9:00 am to 6:00 pm in Santiago de los Caballeros correspond to 10:00 am to 7:00 pm in ADT. At other times of the year, working hours of 9:00 am to 6:00 pm in Santiago de los Caballeros correspond to 9:00 am to 6:00 pm in AST.For most of the year, working hours of 09:00 to 18:00 in Santiago de los Caballeros correspond to 10:00 to 19:00 in ADT. At other times of the year, working hours of 09:00 to 18:00 in Santiago de los Caballeros correspond to 09:00 to 18:00 in AST.

Compare Santiago de los Caballeros time with ADT 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 1 hour behind Atlantic Daylight Time.
8:00 am08:00 in Santiago de los Caballeros, Dominican Republic is 9:00 am09:00 in ADT

Santiago de los Caballeros to ADT call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in Santiago de los Caballeros which corresponds to 10am-6pm10:00-18:00 in ADT

8:00 am08:00 AST (Atlantic Standard Time) (Santiago de los Caballeros, Dominican Republic). Offset UTC -4:00 hours
9:00 am09:00 Atlantic Daylight Time (ADT). Offset UTC -3:00 hours

8:00 am08:00 Santiago de los Caballeros, Dominican Republic / 9:00 am09:00 ADT

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Hourly time comparison
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Santiago de los Caballeros Time Zone and Facts

Time Zone

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

Santiago de los Caballeros Facts

Country
Dominican Republic
Alternative Names
STI, Sant'jago-de-los-Kabal'eros, Sant'jago-de-los-Trejnta-Kabal'eros, Santiago, Santiago de los Caballeros, Santiago de los Kampagieros, Santjago de los Kabaljerosas, santiagodeloseukabayeloseu, sheng de ya ge, Σαντιάγο δε λος Καμπαγιέρος, Сантьяго-де-лос-Кабальерос, Сантьяго-де-лос-Трейнта-Кабальерос, Сантьяго-де-лос-Трейнта-Кабальєрос, סנטיאגו דה לוס קביירוס, سانتیاغو دے لوس کابائیروس, サンティアゴ・デ・ロス・カバリェロス, 聖地牙哥, 산티아고데로스카바예로스
Population
1,200,000
Currency
Peso (DOP)
Geographic Coordinates
19° 27' N Latitude / 70° 41' W Longitude
More About Santiago de los Caballeros

Atlantic Daylight Time

Offset: ADT is 3 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Bermuda, Canada, Greenland

Principal Cities: The largest city in the ADT time zone is Halifax in Canada, with about 471,559 people. Other major cities in this time zone include Sydney, Moncton, Saint John, Fredericton.

French: HAA - Heure Avancée de l'Atlantique

Map of the areas on Atlantic Daylight Time (ADT)
ADT part of the year

Today all shaded areas are on ADT.

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

123456789101112Start: Atlantic Daylight Time (ADT) 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: Atlantic Daylight Time (ADT) 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 Canada daylight saving time and upcoming clock changes worldwide.

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 an offset of three hours 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
Time zones with the GMT -3 offset:
  • ADT - Atlantic Daylight Time
  • PMT - Pierre & Miquelon Standard Time
  • PMST - Pierre & Miquelon Standard Time
  • AMST - Amazon Summer Time
  • ART - Argentina Time
  • BRT - Brasilia Time
  • CLST - Chile Summer Time
  • FKST - Falkland Islands Summer Time
  • FKT - Falkland Islands Time
  • GFT - French Guiana Time
  • P - Papa Time Zone
  • PYST - Paraguay Summer Time
  • PYT - Paraguay Time
  • SRT - Suriname Time
  • UYT - Uruguay Time