Delivery timeframes are always estimated and not guaranteed, so any indication of a delivery date is not final as these can change up until the last moment.
A delivery is only confirmed scheduled and loaded into a vehicle for delivery whenever the courier tracking indicates that the shipment is Out For Delivery. When this happens, the timeframes for delivery is from 9AM to 6PM.
FedEx (Domestic and International)
The shipment should show that the scheduled delivery date is set to today, and further tracking scans should show the shipment Out for Delivery.

DHL Express (International)
The shipment tracking should indicate that the “shipment is out with the courier for delivery.”

