Factual error: In the very first shot of the movie, a clock is shown ticking. The time on the clock reads 05:59:56. It is obviously AM because a few seconds later at 06:00:00, Frank wakes up as if it was morning. As Frank sits up, clear daylight is visible outside of the window. This scene is supposed to be set during winter. We know this because there are many Christmas decorations. Since this is meant to be winter, it should still be dark at that time of day. (00:00:40)
Suggested correction: At the beginning of the movie it's September or early October if latest in the year. At Cleveland's latitude there's enough sunlight at 6am to experience such lighting through a window facing south.
First, what in the film places the opening scene in Sept or Oct? There's too much snow on the ground for it to be either of those months (it doesn't snow in September and rarely in October, but only late October). Second, even if it was set in October, the sun doesn't rise until around 7:30AM or 8:00AM.
I disagree. I think what Bishop73 wrote above is correct. The opening scene at 6:00 AM showed daylight, which would be too early for October, November, and December in Ohio. The movie apparently begins in December based on the amount of Christmas decorations in the neighborhood. Sunrise might be between 7:30 - 8:00 AM and twilight is about 30 minutes prior to sunrise. It simply would not be that light out at 6:00 AM.
Continuity mistake: In the beginning Frank wakes up at 6am. He walks downstairs and the clock in the kitchen shows 7am.
Suggested correction: I considered the 7:00 AM time on the clock as representing the passage of one hour since Red got up. Red is shown leaving his bedroom, walking down the hall while putting on his robe, and possibly entering the bathroom or other room. Perhaps more significantly, when Red enters the room where the later time (7:00) can be seen, he is no longer wearing the robe plus has a cup of coffee with him (which took time to prepare). After this, he goes to another room to exercise. These activities probably are his ways of passing time until he can call about his pension check - the office might not open until 8:00-9:00 AM.