Calgary to Groton, CT: time difference
Groton, CT 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 18:07 6:07 PM Groton, CT 20:07 8:07 PM You –:–
18:07 6:07 PM
Mountain Daylight Time · UTC-6
☀️ 08:09 · 🌙 18:35
20:07 8:07 PM
Eastern Daylight Time · UTC-4
☀️ 07:06 · 🌙 18:01
·
+2 h
Groton, CT is 2 h ahead of Calgary.
When you, Calgary and Groton, CT 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
🇺🇸 Groton, CT
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 | 🇺🇸 Groton, CT |
|---|---|---|
| Local time | 18:07 | 20:07 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 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/New York |
| Daylight saving | On summer time → UTC-7, Nov 1, 01:00 | On summer time → UTC-5, Nov 1, 01:00 |
| Sunrise | 08:09 | 07:06 |
| Sunset | 18:35 | 18:01 |
| Daylight | 10 h 26 min | 10 h 55 min |
| People on this clock | 1,267,344 | 40,115 |
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 Groton, CT: common questions
How many hours ahead of Calgary is Groton, CT?
The clocks in Groton 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 Groton, CT?
At 9:00 AM in Calgary, clocks in Groton show 11:00 AM.
What time is it in Groton, CT, at the end of the working day in Calgary?
The working day in Calgary ends at 6:00 PM; in Groton it is 8:00 PM at that moment.
When is a good time to call Groton, CT, from Calgary?
Between 9:00 AM and 4:00 PM in Calgary – that is 11:00 AM to 6:00 PM in Groton – both places are within working hours (9:00 AM–6:00 PM).
When is it already the next day in Groton, CT?
From 10:00 PM in Calgary it is already the next day in Groton. The other way round, until 2:00 AM in Groton it is still the previous day in Calgary.
Is the time difference between Calgary and Groton, CT, the same all year?
No. Only Groton switches to summer time, so the gap changes twice a year. From November 1, 2026, Groton will be 1 hour ahead of Calgary.
