Calgary to St Thomas: time difference
St Thomas 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 12:55 12:55 PM St Thomas 14:55 2:55 PM You –:–
12:55 12:55 PM
Mountain Daylight Time · UTC-6
☀️ 08:04 · 🌙 18:41
14:55 2:55 PM
Atlantic Standard Time · UTC-4
☀️ 06:15 · 🌙 17:57
·
+2 h
St Thomas is 2 h ahead of Calgary.
When you, Calgary and St Thomas 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
🇻🇮 St Thomas
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 | 🇻🇮 St Thomas |
|---|---|---|
| Local time | 12:55 | 14:55 |
| Local date | Saturday, October 17, 2026 | Saturday, October 17, 2026 |
| Time zone | Mountain Daylight Time | Atlantic Standard Time |
| UTC offset | UTC-6 | UTC-4 |
| Offset from Calgary | — | +2 h |
| IANA zone | America/Edmonton | America/St Thomas |
| Daylight saving | On summer time → UTC-7, Nov 1, 01:00 | Not observed |
| Sunrise | 08:04 | 06:15 |
| Sunset | 18:41 | 17:57 |
| Daylight | 10 h 37 min | 11 h 42 min |
| People on this clock | 1,267,344 | 20,000 |
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 St Thomas: common questions
How many hours ahead of Calgary is St Thomas?
The clocks in St Thomas are 2 hours ahead of those in Calgary (UTC−4 and UTC−6).
What time is it in St Thomas when it is 9:00 AM in Calgary?
When it is 9:00 AM in Calgary, it is 11:00 AM in St Thomas.
What time is it in St Thomas when it is 6:00 PM in Calgary?
When it is 6:00 PM in Calgary, it is 8:00 PM in St Thomas.
Is there a time when both Calgary and St Thomas are at work?
Yes: from 9:00 AM to 4:00 PM in Calgary (11:00 AM to 6:00 PM in St Thomas), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in St Thomas compared with Calgary?
The new day starts in St Thomas earlier: at 10:00 PM in Calgary it is already midnight there. Until 2:00 AM in St Thomas, Calgary is still on the previous day.
Does the time gap between Calgary and St Thomas change during the year?
No, the clocks change neither in Calgary nor in St Thomas, so the gap is 2 hours all year round.
