How Calgary's times are computed
For Calgary (51.08° N, 114.08° W) Hourora computes the sun's position for each date and solves for each prayer: Fajr 15°, Isha 15°. Asr uses the standard shadow rule. The times are shown in Mountain Daylight Time, daylight saving included.
The default is the method usually published in Canada: Islamic Society of North America (ISNA). You can choose another method, the Asr rule and the high-latitude rule above; the choice is saved on this device.