ADT to Q Converter
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Quick answers
Selected conversion
8:00 am08:00 AST (UTC-4), Nov 10, 2026 = 8:00 am08:00 Q (UTC-4), Nov 10, 2026
AST and Q have the same local time.
ADT and Q examples
These examples always use ADT (UTC-3) and Q (UTC-4). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
ADT is 1 hour ahead of Q.
How the time difference changes
For most of the year, ADT is 1 hour ahead of Q. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, AST and Q have the same time.
For most of the year, working hours of 9:00 am to 6:00 pm in ADT correspond to 8:00 am to 5:00 pm in Q. At other times of the year, working hours of 9:00 am to 6:00 pm in AST correspond to 9:00 am to 6:00 pm in Q.For most of the year, working hours of 09:00 to 18:00 in ADT correspond to 08:00 to 17:00 in Q. At other times of the year, working hours of 09:00 to 18:00 in AST correspond to 09:00 to 18:00 in Q.
Compare ADT time with Q time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Atlantic Standard Time and Quebec Time Zone have the same local time.
8:00 am08:00 in AST is 8:00 am08:00 in Q
AST to Q call time
Best time for a conference call or a meeting is between 9am-6pm09:00-18:00 in AST which corresponds to 9am-6pm09:00-18:00 in Q.
8:00 am08:00 Atlantic Standard Time (AST). Offset UTC -4:00 hours
8:00 am08:00 Quebec Time Zone (Q). Offset UTC -4:00 hours
8:00 am08:00 AST / 8:00 am08:00 Q
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 the shaded areas are on UTC−4 (Atlantic Standard Time).
Daylight Saving: Atlantic Daylight Time (ADT) is a daylight saving/summer time zone, but some places set clocks back one hour during winter and observe Atlantic Standard Time (AST).
End: Atlantic Daylight Time (ADT) 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: Atlantic Daylight Time (ADT) 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 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
Quebec Time Zone
Offset: Q is 4 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Anguilla, Antigua and Barbuda, Aruba, Bahamas, Barbados, Bermuda, Bolivia, Brazil, British Virgin Islands, Canada, Caribbean Netherlands, Chile, Cuba, Curaçao, Dominica, Dominican Republic, Greenland, Grenada, Guadeloupe, Guyana, Haiti, Martinique, Montserrat, Puerto Rico, Saint Barthélemy, Saint Kitts and Nevis, Saint Lucia, Saint Martin, Saint Vincent and the Grenadines, Sint Maarten, Trinidad and Tobago, Turks and Caicos Islands, United States, US Virgin Islands, Venezuela
Principal Cities: The largest city in the Q time zone is New York City in the United States, with about 8.804 million people. Other major cities in this time zone include Santiago, Caracas, Toronto, Manaus.
Daylight Saving: Some places on Quebec Time Zone (Q) keep the same time all year, while others use Q for only part of the year and change their clocks for daylight saving time; see upcoming clock changes worldwide.
Today some of the lighter areas are on UTC−5 (EST) or UTC−3.
Q 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 Q
- Q - short form of 'Quebec'
- 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