Everything is easier with hindsight. The release date for STiD
made sense when it was set. It's not as if people were worried about that release date prior to release and making predictions of an underperforming opening weekend. Quite the contrary. Iron Man 3
both ended up overperforming by a wide margin. If you could foretell a year or more in advance which films were going to do that it would be a lot easier to select good release dates.