About order date, request date, and expected ship date
Order date
The order date is the date that the order was entered and defaults from the system date, unless you specify a different date.
Request date
The request date defaults from the expected ship date. The request date is used for processing only if you selected this as the allocation date during Billing setup. See Setting up the Billing application.
Expected ship date
The expected ship date is the date the customer order is expected to ship from the warehouse. The expected ship date also is a primary selection parameter for printing the pick list. This date comes from the order date plus the number of ship days. Ship days were defined when you set up the process levels in Billing. See Setting up the Billing application.