Waltham, MA to Calgary: time difference
Calgary is 2 h behind Waltham, MA. 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.
Waltham, MA 08:17 8:17 AM Calgary 06:17 6:17 AM You –:–
08:17 8:17 AM
Eastern Daylight Time · UTC-4
☀️ 07:02 · 🌙 18:00
06:17 6:17 AM
Mountain Daylight Time · UTC-6
☀️ 08:05 · 🌙 18:39
·
−2 h
Calgary is 2 h behind Waltham, MA.
When you, Waltham, MA and Calgary are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇺🇸 Waltham, MA
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
🇨🇦 Calgary
22 10 PM 23 11 PM 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
📍 Your time
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Time zones side by side
| Detail | 🇺🇸 Waltham, MA | 🇨🇦 Calgary |
|---|---|---|
| Local time | 08:17 | 06:17 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | Eastern Daylight Time | Mountain Daylight Time |
| UTC offset | UTC-4 | UTC-6 |
| Offset from Waltham, MA | — | −2 h |
| IANA zone | America/New York | America/Edmonton |
| Daylight saving | On summer time → UTC-5, Nov 1, 01:00 | On summer time → UTC-7, Nov 1, 01:00 |
| Sunrise | 07:02 | 08:05 |
| Sunset | 18:00 | 18:39 |
| Daylight | 10 h 58 min | 10 h 34 min |
| People on this clock | 60,636 | 1,267,344 |
Compare Waltham, MA with another city
More comparisons with Waltham, MA: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Waltham, MA and Calgary: common questions
What is the time difference between Waltham, MA, and Calgary?
Calgary is 2 hours behind: it uses UTC−6, while Waltham is on UTC−4.
What time is it in Calgary at the start of the working day in Waltham, MA?
The working day in Waltham starts at 9:00 AM; in Calgary it is 7:00 AM at that moment.
What time is it in Calgary when it is 6:00 PM in Waltham, MA?
When it is 6:00 PM in Waltham, it is 4:00 PM in Calgary.
When do working hours in Waltham, MA, and in Calgary overlap?
Working hours (9:00 AM–6:00 PM) overlap from 11:00 AM to 6:00 PM in Waltham, which is 9:00 AM to 4:00 PM in Calgary.
When is it still the previous day in Calgary?
Until 2:00 AM in Waltham, MA, it is still the previous day in Calgary. The other way round, from 10:00 PM in Calgary it is already the next day in Waltham.
Does the time difference between Waltham, MA, and Calgary change?
Yes. The clocks change only in Waltham. From November 1, 2026, Calgary will be 1 hour behind Waltham.
