Dating terms.

Payment will be due on a specific date. Date does not change relative to Invoice date. Usually a new date will be assigned for each season - i.e. Due date might be 12/15/08 for goods shipped 9/15/08 to 11/30/08. Usually subject to a credit limit, and customer can purchase more by paying for past shipments.

Allows small retailers to purchase ahead for the season. Easier for vendor to manage inventory and shipments by spreading seasonal purchases out.