Love passing by this area whenever in the Old Port - there is always something going on - even during the freezing winter months!
I recently visited the Place Nordique installation. It was -25C that evening but it looked absolutely magical - an actual winter wonderland. There was live music being performed and people warming up near the cozy log fires whilst enjoying the gorgeous display of lights & local crafts.
During the summer, when the Cirque du Soleil performances are in town, there is always some kind circus type display being shown which attracts massive crowds. You are guaranteed to find it super crowded in the summer but that's the charm of the place!
Local or tourist, Quai Jacques-Cartier is a must to visit!