ADT to Oklahoma City Time Converter
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Quick answers
Selected conversion
9:00 am09:00 ADT (UTC-3), Oct 28, 2026 = 7:00 am07:00 CDT (UTC-5), Oct 28, 2026
ADT is 2 hours ahead of Oklahoma City.
How the time difference changes
For most of the year, ADT is 2 hours ahead of Oklahoma City. From Nov 1, 2026 to Mar 14, 2027, AST is 2 hours ahead of Oklahoma City. Briefly around clock changes, ADT is 3 hours ahead of Oklahoma City or AST is 1 hour ahead of Oklahoma City.
For most of the year, working hours of 9:00 am to 6:00 pm in ADT correspond to 7:00 am to 4:00 pm in Oklahoma City. At other times of the year, working hours of 9:00 am to 6:00 pm in AST correspond to 7:00 am to 4:00 pm in Oklahoma City.For most of the year, working hours of 09:00 to 18:00 in ADT correspond to 07:00 to 16:00 in Oklahoma City. At other times of the year, working hours of 09:00 to 18:00 in AST correspond to 07:00 to 16:00 in Oklahoma City.
Compare ADT time with Oklahoma City time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Atlantic Daylight Time is 2 hours ahead of CDT (Central Daylight Time).
9:00 am09:00 in ADT is 7:00 am07:00 in Oklahoma City, OK, USA
ADT to Oklahoma City call time
Best time for a conference call or a meeting is between 11am-6pm11:00-18:00 in ADT which corresponds to 9am-4pm09:00-16:00 in Oklahoma City
9:00 am09:00 Atlantic Daylight Time (ADT). Offset UTC -3:00 hours
7:00 am07:00 CDT (Central Daylight Time) (Oklahoma City, OK, USA). Offset UTC -5:00 hours
9:00 am09:00 ADT / 7:00 am07:00 Oklahoma City, OK, USA
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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
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).
Start: 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.
End: 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
- -03 - basic short
- -0300 - basic
- -03:00 - extended
- -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.
- Papa - Military abbreviation for ADT
- P - short form of 'Papa'
- America/Glace_Bay
- America/Goose_Bay
- America/Halifax
- America/Moncton
- America/Thule
- Atlantic/Bermuda
- Canada/Atlantic
- 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
Oklahoma City Time Zone and Facts
Time Zone
CST – Central Standard Time, UTC-6 (standard time)