Calgary to Waltham, MA: time difference
Waltham, MA 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 07:09 7:09 AM Waltham, MA 09:09 9:09 AM You –:–
07:09 7:09 AM
Mountain Daylight Time · UTC-6
☀️ 08:05 · 🌙 18:39
09:09 9:09 AM
Eastern Daylight Time · UTC-4
☀️ 07:02 · 🌙 18:00
·
+2 h
Waltham, MA is 2 h ahead of Calgary.
When you, Calgary and Waltham, MA 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
🇺🇸 Waltham, MA
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 | 🇺🇸 Waltham, MA |
|---|---|---|
| Local time | 07:09 | 09:09 |
| 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/New York |
| Daylight saving | On summer time → UTC-7, Nov 1, 01:00 | On summer time → UTC-5, Nov 1, 01:00 |
| Sunrise | 08:05 | 07:02 |
| Sunset | 18:39 | 18:00 |
| Daylight | 10 h 34 min | 10 h 58 min |
| People on this clock | 1,267,344 | 60,636 |
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 Waltham, MA: common questions
How far ahead of Calgary is Waltham, MA?
Waltham is 2 hours ahead of Calgary: UTC−4 against UTC−6.
If it is 9:00 AM in Calgary, what time is it in Waltham, MA?
At 9:00 AM in Calgary, clocks in Waltham show 11:00 AM.
If it is 6:00 PM in Calgary, what time is it in Waltham, MA?
At 6:00 PM in Calgary, clocks in Waltham show 8:00 PM.
When do working hours in Calgary and in Waltham, MA, overlap?
Working hours (9:00 AM–6:00 PM) overlap from 9:00 AM to 4:00 PM in Calgary, which is 11:00 AM to 6:00 PM in Waltham.
When does the date change in Waltham, MA, compared with Calgary?
The new day starts in Waltham earlier: at 10:00 PM in Calgary it is already midnight there. Until 2:00 AM in Waltham, Calgary is still on the previous day.
Does the time gap between Calgary and Waltham, MA, change during the year?
Yes – daylight saving time is used in Waltham but not in Calgary. From November 1, 2026, Waltham will be 1 hour ahead of Calgary.
