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Alberta, Canada

Alberta uses Mountain Time. It normally alternates between Mountain Standard Time, UTC−7, and Mountain Daylight Time, UTC−6. Calgary and Edmonton are its largest cities, and sunrise varies substantially by season and latitude.

Calgary, Canada

Friday, 4 September 2026

UTC−6 · America/Edmonton

Time and sun data for Calgary — the largest city of Alberta

The sun in Calgary

Sunrise 06:56 Solar noon 13:37 Sunset 20:18 Daylight 13 h 22 min Night 10 h 38 min Civil twilight 06:22 – 20:52

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Current time in Alberta, Canada

Most Alberta clocks follow the Mountain Time system, moving between the standard and daylight offsets under the province’s seasonal clock rules. Edmonton, Calgary, Red Deer, Lethbridge, Medicine Hat, and communities throughout the province keep the same civil time.

When a clock is labelled simply “MT,” the abbreviation avoids guessing whether standard or daylight time is currently in effect. MST specifically means UTC−7, while MDT means UTC−6. Using the date-aware America/Edmonton time zone in software is safer than storing one of those offsets permanently.

In Alberta, “meet at seven” is simple; converting it overseas is where the paperwork begins.

Calgary, Edmonton, and other Alberta cities

Calgary and Edmonton are the province’s two largest urban centres and the most common reference choices in world-clock services. Red Deer sits between them, while Lethbridge and Medicine Hat are major southern centres. The shared provincial clock makes travel between these cities uncomplicated.

Edmonton is the provincial capital and a standard database reference for Alberta time. Calgary follows the same Mountain Time transitions as Edmonton. Red Deer requires no clock adjustment when arriving from either large city.

Lethbridge and Medicine Hat share the provincial time despite being farther south. Use a date-aware regional zone for future appointments rather than a bare UTC offset. Neighbouring jurisdictions do not all handle seasonal time identically, so a road journey beyond Alberta may require attention to both the border and the date. A navigation device normally manages this, but printed schedules and manually configured clocks deserve a quick check.

Long summer evenings and winter sunrise

Alberta’s northern latitude produces a pronounced seasonal change in daylight. Summer days are longer, while winter brings later sunrise and shorter daylight. Calgary and Edmonton share a time zone, yet Edmonton’s more northerly position gives it a different daylight pattern.

For an accurate daily value, choose the specific city and date. Elevation, terrain, buildings, and weather influence when direct sunlight is actually visible, although a published sunrise is calculated using a defined horizon model. Dawn begins before sunrise, and usable outdoor light may arrive before the solar disc appears.

Select Calgary, Edmonton, or the actual community. Verify that the calendar date is correct. Let the service apply MST or MDT for that date. Distinguish sunrise and sunset from twilight times. The seasonal clock transition and the astronomical change in daylight are separate effects. Both can move the displayed sunrise hour, which is why copying a value from another month is unreliable.

Questions and answers
Is Alberta on Mountain Time?
Yes. Alberta uses Mountain Standard Time and Mountain Daylight Time according to its seasonal clock schedule.
Do Calgary and Edmonton have the same time?
Yes. Their official clocks match, although their sunrise and sunset times differ.
Which time-zone setting should software use?
Use America/Edmonton or another date-aware Alberta zone instead of fixing every date to UTC−7 or UTC−6.

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