The temperatures are just warm enough to melt nearby surface snow causing the sidewalks to get wet during the day and freeze and night. Sidewalk ice that isn’t fully melting during the day is soft and slick. Please tread carefully. There are many sidewalks having this daily melt/freeze cycle especially those alongside hills or large windrows.
The City of Calgary provides free sand-salt mix at fire station #19 – 13807 Parkland Blvd. S.E. “A sand-salt mixture called pickle is available for individual use on sidewalks bordering private properties.”