If you look close, theres a Fox body parked in front of the transit bus, and I'm pretty sure there's a couple of late 70's Nova's as well.
It looks like the Brunswick Square parking garage is still under construction, so this is probably early 80's.
There's a crane and structural steel on the upper right, so Brunswick Square and the Delta hotel still under construction as well.
Also noticed the Caprice Saint John Police cruisers parked on the left, cop shop used to be in City Hall, plus no walkway connection between Brunswick Square and Market Square. Market Square opened in '83 I think.
Did a quick Google street view for a current perspective.