From my experience with the Yorkdale Grand Opening they usually know about 2-3 week window in which the store is going to open but they don't set a firm date until just a few weeks/days prior. Mainly because it all comes down to the contractors installing the floors, shelves, etc. Which depending on the company and location can flex a few days. Thus they'll say Spring 2014, knowing that they'll open up somewhere between the April 30 - May 31, all depending on contractors. So most likely you'll know the grand opening date about 4-6 weeks prior at the earliest.