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ADT
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CanadaMDT
UTC−6
3h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

9:00 am09:00 ADT (UTC-3), Oct 26, 2026 = 6:00 am06:00 MDT (UTC-6), Oct 26, 2026

ADT is 3 hours ahead of Grande Prairie.

How the time difference changes

In 2026, ADT is 3 hours ahead of Grande Prairie for most of the year. Until Mar 8, 2026, AST is 3 hours ahead of Grande Prairie. From Nov 1, 2026 to Mar 14, 2027, AST is 2 hours ahead of Grande Prairie. Briefly around clock changes, ADT is 4 hours ahead of Grande Prairie.

In 2026, working hours of 9:00 am to 6:00 pm in ADT correspond to 6:00 am to 3:00 pm in Grande Prairie for most of the year. At other times that year, working hours of 9:00 am to 6:00 pm in AST correspond to 6:00 am to 3:00 pm in Grande Prairie or working hours of 9:00 am to 6:00 pm in AST correspond to 7:00 am to 4:00 pm in Grande Prairie.In 2026, working hours of 09:00 to 18:00 in ADT correspond to 06:00 to 15:00 in Grande Prairie for most of the year. At other times that year, working hours of 09:00 to 18:00 in AST correspond to 06:00 to 15:00 in Grande Prairie or working hours of 09:00 to 18:00 in AST correspond to 07:00 to 16:00 in Grande Prairie.

Compare ADT time with Grande Prairie time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Atlantic Daylight Time is 3 hours ahead of MDT (Mountain Daylight Time).
9:00 am09:00 in ADT is 6:00 am06:00 in Grande Prairie, Canada

ADT to Grande Prairie call time
Best time for a conference call or a meeting is between 12pm-6pm12:00-18:00 in ADT which corresponds to 9am-3pm09:00-15:00 in Grande Prairie

9:00 am09:00 Atlantic Daylight Time (ADT). Offset UTC -3:00 hours
6:00 am06:00 MDT (Mountain Daylight Time) (Grande Prairie, Canada). Offset UTC -6:00 hours

9:00 am09:00 ADT / 6:00 am06:00 Grande Prairie, Canada

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Hourly time comparison
ADTGrande Prairie, Canada
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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

Grande Prairie Time Zone and Facts

Time Zone

Abbreviation / Offset
MDT – Mountain Daylight Time, UTC-6 (now)
Clock Changes

Grande Prairie Facts

Country
Canada
Alternative Names
Gran Preri, Grand Preri, Grand-Prehry, Grand-Preri, Grande Prairie, Qrand-Preri, YQU, da cao yuan cheng, geulaendipeuleli, ghrand brary, grnd pryry, Гранд Прери, Гранд-Прери, Гранд-Прері, Гранд-Прэры, غراند براري, گرانڈ پرائری, گرند پریری, گرینڈ پریری, გრანდე-პრერია, 大草原城, 그랜디프레리
Population
70,385
Currency
Dollar (CAD)
Geographic Coordinates
55° 10' N Latitude / 118° 48' W Longitude
International Dialing Code
+1