Date on which goods are (or are due to be) delivered or a service is (or is due to be) performed.
This can be the date desired by the customer or the date confirmed by the vendor.
Date on which the goods are to arrive on the customer's premises.
The delivery date can either be the delivery date requested by the customer (desired delivery date) or the date confirmed in the vendor's order acknowledgment or shipping confirmation for example (confirmed or acknowledged delivery date).