PDT to AST Caribbean Converter
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Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
8:30 am08:30 PST (UTC-8), Nov 1, 2026 = 12:30 pm12:30 AST (UTC-4), Nov 1, 2026
PST is 4 hours behind AST.
PDT and AST examples
These examples always use PDT (UTC-7) and AST (UTC-4). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
PDT is 3 hours behind AST.
How the time difference changes
For most of the year, PDT is 3 hours behind AST Caribbean. From Nov 1, 2026 to Mar 14, 2027, PST is 4 hours behind AST Caribbean.
For most of the year, working hours of 9:00 am to 6:00 pm in PDT correspond to 12:00 pm to 9:00 pm in AST Caribbean. At other times of the year, working hours of 9:00 am to 6:00 pm in PST correspond to 1:00 pm to 10:00 pm in AST Caribbean.For most of the year, working hours of 09:00 to 18:00 in PDT correspond to 12:00 to 21:00 in AST Caribbean. At other times of the year, working hours of 09:00 to 18:00 in PST correspond to 13:00 to 22:00 in AST Caribbean.
Compare PDT time with AST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Pacific Standard Time is 4 hours behind Atlantic Standard Time.
8:30 am08:30 in PST is 12:30 pm12:30 in AST
PST to AST call time
Best time for a conference call or a meeting is between 9am-2pm09:00-14:00 in PST which corresponds to 1pm-6pm13:00-18:00 in AST
8:30 am08:30 Pacific Standard Time (PST). Offset UTC -8:00 hours
12:30 pm12:30 Atlantic Standard Time (AST). Offset UTC -4:00 hours
8:30 am08:30 PST / 12:30 pm12:30 AST
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.
| PST | AST |
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Pacific Daylight Time
Offset: PDT is 7 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Mexico, United States
Principal Cities: The largest city in the PDT 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: HAP - Heure Avancée du Pacifique
Spanish: PT - Zona Noroeste
Today the shaded areas are on UTC−8 (Pacific Standard Time).
Daylight Saving: Pacific Daylight Time (PDT) is a daylight saving/summer time zone, but some places set clocks back one hour during winter and observe Pacific Standard Time (PST).
End: Pacific Daylight Time (PDT) ended on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were 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.
Start: Pacific Daylight Time (PDT) starts on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00. Daylight saving starts annually on the second Sunday of March.
See USA daylight saving time and upcoming clock changes worldwide.
PDT representations, usage and related time zones
- -07 - basic short
- -0700 - basic
- -07:00 - extended
- -0700 - sign character (-) followed by a four digit time providing hours (07) and minutes (00) of the offset. Indicates an offset of seven hours to the west of the zero meridian.
- Tango - Military abbreviation for PDT
- T - short form of 'Tango'
- America/Ensenada
- America/Los_Angeles
- America/Santa_Isabel
- America/Tijuana
- America/Vancouver
- Canada/Pacific
- Mexico/BajaNorte
- PST8PDT
- US/Pacific
- MST - Mountain Standard Time
- PDT - Pacific Daylight Time
- YST - Yukon Standard Time
- T - Tango Time Zone
Atlantic Standard Time
Offset: AST is 4 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Anguilla, Antigua and Barbuda, Aruba, Barbados, Bermuda, British Virgin Islands, Canada, Caribbean Netherlands, Curaçao, Dominica, Dominican Republic, Greenland, Grenada, Guadeloupe, Martinique, Montserrat, Puerto Rico, Saint Barthélemy, Saint Kitts and Nevis, Saint Lucia, Saint Martin, Saint Vincent and the Grenadines, Sint Maarten, Trinidad and Tobago, US Virgin Islands
Principal Cities: The largest city in the AST time zone is Santo Domingo in the Dominican Republic, with about 2.202 million people. Other major cities in this time zone include Santiago de los Caballeros, Halifax, San Juan, San Pedro de Macorís.
Daylight Saving: Some places on Atlantic Standard Time (AST) keep the same time all year, while others use AST for only part of the year and change their clocks for daylight saving time; see upcoming clock changes worldwide.
Today all shaded areas are on AST.
AST representations, usage and related time zones
- -04 - basic short
- -0400 - basic
- -04:00 - extended
- -0400 - sign character (-) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates an offset of four hours to the west of the zero meridian.
- Quebec - Military abbreviation for AST
- Q - short form of 'Quebec'
- America/Anguilla
- America/Antigua
- America/Aruba
- America/Barbados
- America/Blanc-Sablon
- America/Curacao
- America/Dominica
- America/Glace_Bay
- America/Goose_Bay
- America/Grenada
- America/Guadeloupe
- America/Halifax
- America/Kralendijk
- America/Lower_Princes
- America/Marigot
- America/Martinique
- America/Moncton
- America/Montserrat
- America/Port_of_Spain
- America/Puerto_Rico
- America/Santo_Domingo
- America/St_Barthelemy
- America/St_Kitts
- America/St_Lucia
- America/St_Thomas
- America/St_Vincent
- America/Thule
- America/Tortola
- America/Virgin
- Atlantic/Bermuda
- Canada/Atlantic
- Atlantic Standard Time - UTC -4
- Arabia Standard Time - UTC +3
- AST - Atlantic Standard Time
- EDT - Eastern Daylight Time
- AMT - Amazon Time
- BOT - Bolivia Time
- CDT - Cuba Daylight Time
- CLT - Chile Standard Time
- GYT - Guyana Time
- HLV - Hora Legal de Venezuela
- Q - Quebec Time Zone
- VET - Venezuelan Standard Time