Calgary to Thunder Bay: time difference
Thunder Bay is 2 h ahead of Calgary. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Calgary 11:37 11:37 AM Thunder Bay 13:37 1:37 PM You –:–
11:37 11:37 AM
Mountain Daylight Time · UTC-6
☀️ 08:05 · 🌙 18:39
13:37 1:37 PM
Eastern Daylight Time · UTC-4
☀️ 08:22 · 🌙 19:04
·
+2 h
Thunder Bay is 2 h ahead of Calgary.
When you, Calgary and Thunder Bay are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇨🇦 Calgary
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇨🇦 Thunder Bay
2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM 0 12 AM 1 1 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇨🇦 Calgary | 🇨🇦 Thunder Bay |
|---|---|---|
| Local time | 11:37 | 13:37 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | Mountain Daylight Time | Eastern Daylight Time |
| UTC offset | UTC-6 | UTC-4 |
| Offset from Calgary | — | +2 h |
| IANA zone | America/Edmonton | America/Toronto |
| Daylight saving | On summer time → UTC-7, Nov 1, 01:00 | On summer time → UTC-5, Nov 1, 01:00 |
| Sunrise | 08:05 | 08:22 |
| Sunset | 18:39 | 19:04 |
| Daylight | 10 h 34 min | 10 h 42 min |
| People on this clock | 1,267,344 | 107,909 |
Compare Calgary with another city
More comparisons with Calgary: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Calgary and Thunder Bay: common questions
How many hours ahead of Calgary is Thunder Bay?
The clocks in Thunder Bay are 2 hours ahead of those in Calgary (UTC−4 and UTC−6).
If it is 9:00 AM in Calgary, what time is it in Thunder Bay?
At 9:00 AM in Calgary, clocks in Thunder Bay show 11:00 AM.
What time is it in Thunder Bay at the end of the working day in Calgary?
The working day in Calgary ends at 6:00 PM; in Thunder Bay it is 8:00 PM at that moment.
When is a good time to call Thunder Bay from Calgary?
Between 9:00 AM and 4:00 PM in Calgary – that is 11:00 AM to 6:00 PM in Thunder Bay – both places are within working hours (9:00 AM–6:00 PM).
When does the date change in Thunder Bay compared with Calgary?
The new day starts in Thunder Bay earlier: at 10:00 PM in Calgary it is already midnight there. Until 2:00 AM in Thunder Bay, Calgary is still on the previous day.
Is the time difference between Calgary and Thunder Bay the same all year?
No. Only Thunder Bay switches to summer time, so the gap changes twice a year. From November 1, 2026, Thunder Bay will be 1 hour ahead of Calgary.
