King of Prussia to ADT Time Converter
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Quick answers
Selected conversion
8:00 am08:00 EDT (UTC-4), Oct 17, 2026 = 9:00 am09:00 ADT (UTC-3), Oct 17, 2026
King of Prussia is 1 hour behind ADT.
How the time difference changes
For most of the year, King of Prussia is 1 hour behind ADT. From Nov 1, 2026 to Mar 14, 2027, King of Prussia is 1 hour behind AST. Briefly around clock changes, King of Prussia and AST have the same time or King of Prussia is 2 hours behind ADT.
For most of the year, working hours of 9:00 am to 6:00 pm in King of Prussia 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 King of Prussia correspond to 10:00 am to 7:00 pm in AST.For most of the year, working hours of 09:00 to 18:00 in King of Prussia correspond to 10:00 to 19:00 in ADT. At other times of the year, working hours of 09:00 to 18:00 in King of Prussia correspond to 10:00 to 19:00 in AST.
Compare King of Prussia time with ADT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
EDT (Eastern Daylight Time) is 1 hour behind Atlantic Daylight Time.
8:00 am08:00 in King of Prussia, PA, USA is 9:00 am09:00 in ADT
King of Prussia to ADT call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in King of Prussia which corresponds to 10am-6pm10:00-18:00 in ADT
8:00 am08:00 EDT (Eastern Daylight Time) (King of Prussia, PA, USA). Offset UTC -4:00 hours
9:00 am09:00 Atlantic Daylight Time (ADT). Offset UTC -3:00 hours
8:00 am08:00 King of Prussia, PA, USA / 9:00 am09:00 ADT
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King of Prussia Time Zone and Facts
Time Zone
EST – Eastern Standard Time, UTC-5 (standard time)
King of Prussia Facts
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