Revealing mistake: The parade is supposed to take place around Christmas, but in some scenes looking down from above, we see very short shadows under the floats and people (indicating filmed during summer). At Christmas, shadows are long all day especially in Minneapolis.
Revealing mistake: When Howard arrives at the Mall of America he comes down an escalator. We then see a shot of the gathering crowd in front of him. In this shot you can see Howard with a woman in light blue with her hand on his left shoulder as he pushes his way through the crowd. This is before he joins the crowd. (00:26:10)