behind (one's) time
1. Old fashioned or antiquated, as in manner, beliefs, style, etc. I love grandpa, but he is really behind his time when it comes to what constitutes an acceptable relationship. The filmmaker seems to be as behind his time as the films he makes.
2. Later than expected, scheduled, or is appropriate. The driver is always arriving behind his time to collect us.
behind time
Later than expected, scheduled, or is appropriate. Go ahead and begin the meal without us, we're running a little behind time. We're sorry for being a little behind time with our takeoff, ladies and gentlemen. We should be departing shortly.