Offset
The time difference between Ottawa and Shanghai is 12 hours.
Ottawa (EDT) is behind Shanghai (CST).
EDT: UTC-4
CST: UTC+8
Ottawa is currently observing daylight saving time; Shanghai is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Ottawa and Shanghai don't overlap on the same weekday. Shanghai is 12 hours ahead of Ottawa.
With some flexibility, there are two workable windows outside standard hours, depending on which side takes the early or late slot:
- 7 AM–8 AM in Ottawa (7 PM–8 PM in Shanghai) — suggest 7:00 AM Ottawa (7:00 PM Shanghai).
- 7 PM–8 PM in Ottawa (7 AM–8 AM the next day in Shanghai) — suggest 7:00 PM Ottawa (7:00 AM Shanghai).
Either is an early start or late finish for one side, but workable 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
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Ottawa | Shanghai | Day |
|---|---|---|
| 12:00 am | 12:00 pm | Same day |
| 1:00 am | 1:00 pm | Same day |
| 2:00 am | 2:00 pm | Same day |
| 3:00 am | 3:00 pm | Same day |
| 4:00 am | 4:00 pm | Same day |
| 5:00 am | 5:00 pm | Same day |
| 6:00 am | 6:00 pm | Same day |
| 7:00 am | 7:00 pm | Same day |
| 8:00 am | 8:00 pm | Same day |
| 9:00 am | 9:00 pm | Same day |
| 10:00 am | 10:00 pm | Same day |
| 11:00 am | 11:00 pm | Same day |
| 12:00 pm | 12:00 am | +1 day |
| 1:00 pm | 1:00 am | +1 day |
| 2:00 pm | 2:00 am | +1 day |
| 3:00 pm | 3:00 am | +1 day |
| 4:00 pm | 4:00 am | +1 day |
| 5:00 pm | 5:00 am | +1 day |
| 6:00 pm | 6:00 am | +1 day |
| 7:00 pm | 7:00 am | +1 day |
| 8:00 pm | 8:00 am | +1 day |
| 9:00 pm | 9:00 am | +1 day |
| 10:00 pm | 10:00 am | +1 day |
| 11:00 pm | 11:00 am | +1 day |
Daylight saving time
Ottawa observes daylight saving time; Shanghai does not. The offset between the two zones changes when Ottawa transitions: on Sunday, November 1, 2026, clocks fall back from EDT to EST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:36 AM
- Sunset
- 8:43 PM
- Day length
- 15h 7m
- Sunrise
- 5:05 AM
- Sunset
- 6:58 PM
- Day length
- 13h 53m
Daylight overlap: 1h 21m — 5:36 AM–6:58 AM in Ottawa (5:36 PM–6:58 PM in Shanghai). Both locations are in daylight during this window.
Cities in these zones
Other cities in Eastern Time
Other cities in China Standard Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Eastern Time
- YTZ
- YYZ
- YHU
- YMX
- YUL
- YND
- YOW
- YRO
Airports in China Standard Time
- PVG
- SHA
- PEK
- PKX
- SZX
- CAN
- FUO
- CTU
- TFU
- TSN
Related conversions
Common conversions
- What is 9:00 am Ottawa in Shanghai?
- 9:00 am Ottawa is 9:00 pm Shanghai.
- What is 12:00 pm Ottawa in Shanghai?
- 12:00 pm Ottawa is 12:00 am Shanghai, the next day.
- What is 12:30 pm Ottawa in Shanghai?
- 12:30 pm Ottawa is 12:30 am Shanghai, the next day.
- What is 2:00 pm Ottawa in Shanghai?
- 2:00 pm Ottawa is 2:00 am Shanghai, the next day.
- What is 5:00 pm Ottawa in Shanghai?
- 5:00 pm Ottawa is 5:00 am Shanghai, the next day.
- What is 11:30 pm Ottawa in Shanghai?
- 11:30 pm Ottawa is 11:30 am Shanghai, the next day.