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 20:19 8:19 PM St. Thomas 22:19 10:19 PM You –:–
20:19 8:19 PM
Mountain Daylight Time · UTC-6
☀️ 07:59 · 🌙 18:47
22:19 10:19 PM
Eastern Daylight Time · UTC-4
☀️ 07:37 · 🌙 18:46
·
+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 | 20:19 | 22:19 |
| Local date | Wednesday, October 14, 2026 | Wednesday, October 14, 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 | 07:59 | 07:37 |
| Sunset | 18:47 | 18:46 |
| Daylight | 10 h 49 min | 11 h 8 min |
| People on this clock | 1,267,344 | 38,909 |
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 St. Thomas: common questions
What is the time difference between Calgary and St. Thomas?
St. Thomas is 2 hours ahead: it uses UTC−4, while Calgary is on UTC−6.
If it is 9:00 AM in Calgary, what time is it in St. Thomas?
At 9:00 AM in Calgary, clocks in St. Thomas show 11:00 AM.
If it is 6:00 PM in Calgary, what time is it in St. Thomas?
At 6:00 PM in Calgary, clocks in St. Thomas show 8:00 PM.
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 is it already the next day in St. Thomas?
From 10:00 PM in Calgary it is already the next day in St. Thomas. The other way round, until 2:00 AM in St. Thomas it is still the previous day in Calgary.
Is the time difference between Calgary and St. Thomas the same all year?
No. Only St. Thomas switches to summer time, so the gap changes twice a year. From November 1, 2026, St. Thomas will be 1 hour ahead of Calgary.
