Delivery time is usually on the receiving end.
It should say something along the lines of what time of the day. They will mean at the final destination.
That said ... I have had multiple reptile shipments go overtime. =_=
You never want to ship on a Thursday or Friday. Ideally you ship Mon, Tues or Wed. There are I think 3 or so main hubs for FedEx in the US? All deliveries will be passed through them. So for 2 of mine.... They were stuck in Tennessee and extra day on the way to me. For one of them, I don't know where he went but I shipped from Cali to Kansas and he was a day late. Poor little guy must of inherited his mother's bad luck as she was one of my late ones.