Offset
The time difference between Atlantic Time and China Standard Time is 11 hours.
Atlantic Time (ADT) is behind China Standard Time (CST).
ADT: UTC-3
CST: UTC+8
Atlantic Time is currently observing daylight saving time; China Standard Time is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Atlantic Time and China Standard Time don't overlap on the same weekday. China Standard Time is 11 hours ahead of Atlantic Time.
With some flexibility, there’s a workable window outside standard hours:
- 7 AM–9 AM in Atlantic Time (6 PM–8 PM in China Standard Time) — suggest 8:00 AM Atlantic Time (7:00 PM China Standard Time).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
Canada
- New Year's DayThu, Jan 1
- Good FridayFri, Apr 3
- Victoria DayMon, May 18
- Canada DayWed, Jul 1
- Labour DayMon, Sep 7
- National Day for Truth and ReconciliationWed, Sep 30
- ThanksgivingMon, Oct 12
- Christmas DayFri, Dec 25
China
- New Year's DayThu, Jan 1
- Chinese New Year (Spring Festival)Tue, Feb 17
- Labour DayFri, May 1
- Dragon Boat FestivalFri, Jun 19
- Mid-Autumn FestivalFri, Sep 25
- National DayThu, Oct 1
About these zones
Atlantic Time is also known as AST, or ADT. To call Canada, dial +1.
China Standard Time is also known as CST. To call China, dial +86.
China Standard Time is approximately 7,200 miles north of Atlantic Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| AST-ATLANTIC | CST-CHINA | Day |
|---|---|---|
| 12:00 am | 11:00 am | Same day |
| 1:00 am | 12:00 pm | Same day |
| 2:00 am | 1:00 pm | Same day |
| 3:00 am | 2:00 pm | Same day |
| 4:00 am | 3:00 pm | Same day |
| 5:00 am | 4:00 pm | Same day |
| 6:00 am | 5:00 pm | Same day |
| 7:00 am | 6:00 pm | Same day |
| 8:00 am | 7:00 pm | Same day |
| 9:00 am | 8:00 pm | Same day |
| 10:00 am | 9:00 pm | Same day |
| 11:00 am | 10:00 pm | Same day |
| 12:00 pm | 11:00 pm | Same day |
| 1:00 pm | 12:00 am | +1 day |
| 2:00 pm | 1:00 am | +1 day |
| 3:00 pm | 2:00 am | +1 day |
| 4:00 pm | 3:00 am | +1 day |
| 5:00 pm | 4:00 am | +1 day |
| 6:00 pm | 5:00 am | +1 day |
| 7:00 pm | 6:00 am | +1 day |
| 8:00 pm | 7:00 am | +1 day |
| 9:00 pm | 8:00 am | +1 day |
| 10:00 pm | 9:00 am | +1 day |
| 11:00 pm | 10:00 am | +1 day |
Daylight saving time
Atlantic Time observes daylight saving time; China Standard Time does not. The offset between the two zones changes when Atlantic Time transitions: on Sunday, November 1, 2026, clocks fall back from ADT to AST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:31 AM
- Sunset
- 8:56 PM
- Day length
- 15h 25m
- Sunrise
- 4:51 AM
- Sunset
- 6:56 PM
- Day length
- 14h 5m
Daylight overlap: 2h 25m — 5:31 AM–7:56 AM in Atlantic Time (4:31 PM–6:56 PM in China Standard Time). Both locations are in daylight during this window.
Cities in these zones
Cities in Atlantic Time
Cities in China Standard Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Atlantic Time
- YHZ
Airports in China Standard Time
- PVG
- SHA
- PEK
- PKX
- SZX
- CAN
- FUO
- CTU
- TFU
- TSN
Related conversions
Common conversions
- What is 9:00 am AST-ATLANTIC in CST-CHINA?
- 9:00 am AST-ATLANTIC is 8:00 pm CST-CHINA.
- What is 12:00 pm AST-ATLANTIC in CST-CHINA?
- 12:00 pm AST-ATLANTIC is 11:00 pm CST-CHINA.
- What is 12:30 pm AST-ATLANTIC in CST-CHINA?
- 12:30 pm AST-ATLANTIC is 11:30 pm CST-CHINA.
- What is 2:00 pm AST-ATLANTIC in CST-CHINA?
- 2:00 pm AST-ATLANTIC is 1:00 am CST-CHINA, the next day.
- What is 5:00 pm AST-ATLANTIC in CST-CHINA?
- 5:00 pm AST-ATLANTIC is 4:00 am CST-CHINA, the next day.
- What is 11:30 pm AST-ATLANTIC in CST-CHINA?
- 11:30 pm AST-ATLANTIC is 10:30 am CST-CHINA, the next day.