Calgary International Airport lies in the temperate mid-latitudes at 51.12° N, 114.01° W, on America/Edmonton time (UTC-6).
Calgary International Airport has 3 runways. The longest, 17L/35R, measures 14,000 ft by 200 ft, which puts the field in the full-length intercontinental category: a fully loaded Boeing 777 or Airbus A350 can depart for the far side of the world. Surfaces vary across the field (asphalt, concrete). All 3 are lit for night operations.
Runway 17L/35R is aligned roughly south/north, which is the clearest hint you get about the prevailing wind here: runways are built to face the wind that blows most often, because aircraft take off and land into it. With 3 runways across 2 different headings, crews can pick whichever best suits the wind.
The runways are not interchangeable. 11/29 is 8,000 ft against 17L/35R's 14,000 ft, a difference of 6,000 ft, so the shorter one generally takes regional traffic while the longer handles anything heavy.