Offset
The time difference between London and Calgary is 7 hours.
London (BST) is ahead of Calgary (MDT).
BST: UTC+1
MDT: UTC-6
Both zones are currently observing daylight saving time.
When to schedule
Business-hours overlap: 4 PM–5 PM in London (9 AM–10 AM in Calgary).
Both teams are in working hours during this window on weekdays.
Suggested time: 4:00 PM London (9:00 AM Calgary).
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United Kingdom
- Good FridayFri, Apr 3
- Early May Bank HolidayMon, May 4
- Spring Bank HolidayMon, May 25
- Christmas DayFri, Dec 25
- St. Stephen's DayMon, Dec 28
Canada
- New Year's DayThu, Jan 1
- Good FridayFri, Apr 3
- Victoria DayMon, May 18
- Canada DayWed, Jul 1
- Labour DayMon, Sep 7
- National Day for Truth and ReconciliationWed, Sep 30
- ThanksgivingMon, Oct 12
- Christmas DayFri, Dec 25
About these zones
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| London | Calgary | Day |
|---|---|---|
| 12:00 am | 5:00 pm | -1 day |
| 1:00 am | 6:00 pm | -1 day |
| 2:00 am | 7:00 pm | -1 day |
| 3:00 am | 8:00 pm | -1 day |
| 4:00 am | 9:00 pm | -1 day |
| 5:00 am | 10:00 pm | -1 day |
| 6:00 am | 11:00 pm | -1 day |
| 7:00 am | 12:00 am | Same day |
| 8:00 am | 1:00 am | Same day |
| 9:00 am | 2:00 am | Same day |
| 10:00 am | 3:00 am | Same day |
| 11:00 am | 4:00 am | Same day |
| 12:00 pm | 5:00 am | Same day |
| 1:00 pm | 6:00 am | Same day |
| 2:00 pm | 7:00 am | Same day |
| 3:00 pm | 8:00 am | Same day |
| 4:00 pm | 9:00 am | Same day |
| 5:00 pm | 10:00 am | Same day |
| 6:00 pm | 11:00 am | Same day |
| 7:00 pm | 12:00 pm | Same day |
| 8:00 pm | 1:00 pm | Same day |
| 9:00 pm | 2:00 pm | Same day |
| 10:00 pm | 3:00 pm | Same day |
| 11:00 pm | 4:00 pm | Same day |
Daylight saving time
Both zones observe daylight saving time, but they transition on different dates.
London: next transition on Sunday, October 25, 2026.
Calgary: next transition on Sunday, November 1, 2026.
For approximately 7 days between transitions, the offset between London and Calgary differs from its typical value. Recurring meetings during this window will shift by one hour.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 4:46 AM
- Sunset
- 9:15 PM
- Day length
- 16h 30m
- Sunrise
- 5:24 AM
- Sunset
- 9:48 PM
- Day length
- 16h 24m
Daylight overlap: 2m — 4:46 AM–4:48 AM in London (9:46 PM–9:48 PM in Calgary). Both locations are in daylight during this window.
Cities in these zones
Other cities in Greenwich Mean Time
Other cities in Mountain Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Greenwich Mean Time
- LCY
- LGW
- LHR
- LTN
- STN
- BHX
- EMA
- GLA
- PIK
- LBA
Airports in Mountain Time
- YYC
- YEG
Related conversions
Common conversions
- What is 9:00 am London in Calgary?
- 9:00 am London is 2:00 am Calgary.
- What is 12:00 pm London in Calgary?
- 12:00 pm London is 5:00 am Calgary.
- What is 12:30 pm London in Calgary?
- 12:30 pm London is 5:30 am Calgary.
- What is 2:00 pm London in Calgary?
- 2:00 pm London is 7:00 am Calgary.
- What is 5:00 pm London in Calgary?
- 5:00 pm London is 10:00 am Calgary.
- What is 11:30 pm London in Calgary?
- 11:30 pm London is 4:30 pm Calgary.