Spectromagic will probably only run on Saturday while you are there, but Illuminations should run every night. Last year it ran at 9:00 that time of year. I think they change to 9:30 only during the holiday season to accomodate the Candlelight Processional and during high holiday crowd times to allow the park to stay open later. It is always at the close of Epcot's World Showcase - Awesome Show!