Q to AST 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
8:00 am08:00 Q (UTC-4), Nov 10, 2026 = 8:00 am08:00 AST (UTC-4), Nov 10, 2026
Q and AST have the same local time.
Q and AST examples
These examples always use Q (UTC-4) 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.
Q and AST have the same local time.
How the time difference changes
For most of the year, Q is 1 hour behind ADT. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, Q and AST have the same time.
For most of the year, working hours of 9:00 am to 6:00 pm in Q 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 Q correspond to 9:00 am to 6:00 pm in AST.For most of the year, working hours of 09:00 to 18:00 in Q correspond to 10:00 to 19:00 in ADT. At other times of the year, working hours of 09:00 to 18:00 in Q correspond to 09:00 to 18:00 in AST.
Compare Q time with AST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Quebec Time Zone and Atlantic Standard Time have the same local time.
8:00 am08:00 in Q is 8:00 am08:00 in AST
Q to AST call time
Best time for a conference call or a meeting is between 9am-6pm09:00-18:00 in Q which corresponds to 9am-6pm09:00-18:00 in AST.
8:00 am08:00 Quebec Time Zone (Q). Offset UTC -4:00 hours
8:00 am08:00 Atlantic Standard Time (AST). Offset UTC -4:00 hours
8:00 am08:00 Q / 8:00 am08:00 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.
| Q | AST |
|---|---|
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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
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 all shaded areas are on AST.
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).
Start: Atlantic Standard Time (AST) started 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. Standard time starts annually on the first Sunday of November.
End: Atlantic Standard Time (AST) ends 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 local daylight time instead. Standard time ends annually on the second Sunday of March.
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