What time do cargo planes usually takeoff?

UPS, FedEx, etc. What time will they normally takeoff to get from point A to point B? Do they do a lot of overnight flights? In the early morning? Mid afternoon? Or all? ThanksWhat time do cargo planes usually takeoff?
All hours of the day and night.What time do cargo planes usually takeoff?
where i live (indianapolis) I can usually hear the fed ex planes take off anywhere between 3 and 4 in the morning. I think it just depends on the terminal and what time the planes get loaded and ready to go.
The time they filed for take-off. I mean if they're sched to fly at 1400 then if all the cargo is loaded already at 1330 and closed doors they can ask ground control if they can leave early but if another plane is sched for between 1330-1400 then they might have to wait for their slot at 1400.
At whatever time that will get them to the sort center so that they can load up and arrive before the business day begins at their destination. So yes, it's going to be all red eyes all the time if you're going to fly freight.
I have been to Memphis a couple times and Fedex usally starts clearing out about 2:00pm. Pretty neat to watch.