I think it varies by season...but when I last saw it (2 years ago in April), I was staying at the Contemporary and it came by right after Wishes ended (at the time, I believe that was around 9:30, but I might be remembering wrong...but I do clearly recall watching Wishes from the skybridge and then turning around and watching the ELP...I believe it goes by the Poly before it goes by the Contemporary...
Hope this helps, even if it's not very precise...