Mid-afternoon, well, that might mean that you are only doing "light" international, Canada and Mexico, Caribbean, maybe? FedEx has day turns and daylight flying to a lot of those places too. Or are you hiding behind the "depart" word, to try to imply that a 12 hour flight leaving at 5PM is "day"?

I was talking about Europe, Asia, Middle East, etc. Are you really going to state that the majority of those flights are not at night? If so, might I point out that Delta Air Lines - Airline Tickets and Airfare to Worldwide Destinations has your schedule on it?