AST to PMDT Converter
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Quick answers
Selected conversion
9:00 am09:00 ADT (UTC-3), Oct 25, 2026 = 10:00 am10:00 PMDT (UTC-2), Oct 25, 2026
ADT is 1 hour behind PMDT.
AST and PMDT examples
These examples always use AST (UTC-4) and PMDT (UTC-2). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
AST is 2 hours behind PMDT.
How the time difference changes
For most of the year, ADT is 1 hour behind PMDT. From Nov 1, 2026 to Mar 14, 2027, AST is 1 hour behind PMST. Briefly around clock changes, ADT and PMST have the same time or AST is 2 hours behind PMDT.
For most of the year, working hours of 9:00 am to 6:00 pm in ADT correspond to 10:00 am to 7:00 pm in PMDT. At other times of the year, working hours of 9:00 am to 6:00 pm in AST correspond to 10:00 am to 7:00 pm in PMST.For most of the year, working hours of 09:00 to 18:00 in ADT correspond to 10:00 to 19:00 in PMDT. At other times of the year, working hours of 09:00 to 18:00 in AST correspond to 10:00 to 19:00 in PMST.
Compare AST time with PMDT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Atlantic Daylight Time is 1 hour behind Pierre & Miquelon Daylight Time.
9:00 am09:00 in ADT is 10:00 am10:00 in PMDT
ADT to PMDT call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in ADT which corresponds to 10am-6pm10:00-18:00 in PMDT
9:00 am09:00 Atlantic Daylight Time (ADT). Offset UTC -3:00 hours
10:00 am10:00 Pierre & Miquelon Daylight Time (PMDT). Offset UTC -2:00 hours
9:00 am09:00 ADT / 10:00 am10:00 PMDT
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.
| ADT | PMDT |
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| 00:00 next day |
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.
French: HNA - Heure Normale de l'Atlantique
Spanish: AST - Tiempo Estándar del Atlántico
Today the lighter areas are on UTC−3 (ADT).
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Atlantic Daylight Time (ADT).
End: Atlantic Standard Time (AST) 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: Atlantic Standard Time (AST) 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.
See Canada daylight saving time and upcoming clock changes worldwide.
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
Pierre & Miquelon Daylight Time
Offset: PMDT is 2 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Saint Pierre and Miquelon
Principal Cities: The largest city in the PMDT time zone is Saint-Pierre in Saint Pierre and Miquelon, with about 6,200 people. Other major cities in this time zone include Miquelon.
Today all shaded areas are on PMDT.
Daylight Saving: Pierre & Miquelon Daylight Time (PMDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Pierre & Miquelon Standard Time (PMST).
Start: Pierre & Miquelon Daylight Time (PMDT) 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: Pierre & Miquelon Daylight Time (PMDT) 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 Saint Pierre and Miquelon daylight saving time and upcoming clock changes worldwide.
PMDT representations, usage and related time zones
- -02 - basic short
- -0200 - basic
- -02:00 - extended
- -0200 - sign character (-) followed by a four digit time providing hours (02) and minutes (00) of the offset. Indicates an offset of two hours to the west of the zero meridian.
- Oscar - Military abbreviation for PMDT
- O - short form of 'Oscar'
- PMDT - Pierre & Miquelon Daylight Time
- WGT - West Greenland Time
- BRST - Brasilia Summer Time
- FNT - Fernando de Noronha Time
- O - Oscar Time Zone
- UYST - Uruguay Summer Time