ADT to PST Converter
Start by searching for a time zone, city, or town.
Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
9:00 am09:00 ADT (UTC-3), Oct 12, 2026 = 5:00 am05:00 PDT (UTC-7), Oct 12, 2026
ADT is 4 hours ahead of PDT.
ADT and PST (US winter time, UTC-8) examples
These examples always use ADT (UTC-3) and PST (UTC-8). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
ADT is 5 hours ahead of PST.
PST is US Pacific winter time (early November to mid-March). The rest of the year Los Angeles uses PDT (UTC-7), one hour later. For Pacific Time that follows daylight saving time, use ADT to PT. For daylight-time examples, use ADT to PDT.
How the time difference changes
For most of the year, ADT is 4 hours ahead of PDT. From Nov 1, 2026 to Mar 14, 2027, AST is 4 hours ahead of PST. Briefly around clock changes, ADT is 5 hours ahead of PST or AST is 3 hours ahead of PDT.
For most of the year, working hours of 9:00 am to 5:00 pm in ADT correspond to 5:00 am to 1:00 pm in PDT. At other times of the year, working hours of 9:00 am to 5:00 pm in AST correspond to 5:00 am to 1:00 pm in PST.For most of the year, working hours of 09:00 to 17:00 in ADT correspond to 05:00 to 13:00 in PDT. At other times of the year, working hours of 09:00 to 17:00 in AST correspond to 05:00 to 13:00 in PST.
Compare ADT time with PST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Atlantic Daylight Time is 4 hours ahead of Pacific Daylight Time.
9:00 am09:00 in ADT is 5:00 am05:00 in PDT
ADT to PDT call time
Best time for a conference call or a meeting is between 1pm-5pm13:00-17:00 in ADT which corresponds to 9am-1pm09:00-13:00 in PDT
9:00 am09:00 Atlantic Daylight Time (ADT). Offset UTC -3:00 hours
5:00 am05:00 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
9:00 am09:00 ADT / 5:00 am05:00 PDT
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
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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.
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 - 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
Pacific Standard Time
Offset: PST is 8 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Canada, Mexico, United States
Principal Cities: The largest city in the PST time zone is Los Angeles in the United States, with about 3.821 million people. Other major cities in this time zone include Tijuana, San Diego, Mexicali, San Jose.
French: HNP - Heure Normale du Pacifique
Spanish: PT - Tiempo del Pacífico, PT - Zona Noroeste
Today the shaded areas are on UTC−7 (PDT).
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Pacific Daylight Time (PDT).
End: Pacific Standard Time (PST) ended 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 local daylight time instead. Standard time ends annually on the second Sunday of March.
Start: Pacific Standard Time (PST) starts 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. Standard time starts annually on the first Sunday of November.
PST representations, usage and related time zones
- -08 - basic short
- -0800 - basic
- -08:00 - extended
- -0800 - sign character (-) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates an offset of eight hours to the west of the zero meridian.
- Uniform - Military abbreviation for PST
- U - short form of 'Uniform'
- America/Ensenada
- America/Los_Angeles
- America/Santa_Isabel
- America/Tijuana
- America/Vancouver
- Canada/Pacific
- Mexico/BajaNorte
- PST8PDT
- US/Pacific
- Pacific Standard Time - UTC -8
- Pitcairn Standard Time - UTC -8
- AKDT - Alaska Daylight Time
- PST - Pacific Standard Time
- PT - Pacific Time
- PST - Pitcairn Standard Time
- U - Uniform Time Zone