It looks sunny....is that the rink at the West Edmonton Mall, where there is sunlight, I think?
Could be. That photo would be probably April 1986. 1985-86 is the only season when Gretzky, Kurri, Coffey, and Anderson (but not Messier) hit 100+ points.
(If it's at West Edmonton Mall, it's just weeks before the disastrous roller coaster crash there that killed three people.)
EDIT: Checking game logs, Anderson hit 100 points (the last of four to do so) on March 25th 1986, when the Oilers were at Detroit. It was a long road trip, and it was probably March 30th when they flew back to Edmonton (for a home game on April 2nd, vs. Vancouver). Thus, the most likely date of this photo is March 31st or April 1st, 1986.)
-- Forensic analysis Panther