You can assign a base calendar to your company and its business partners, such as customers, vendors or locations. The program will calculate delivery and receipt dates on future sales order, purchase order, transfer order and production order lines according to the calendar’s specified working days.
The following procedure uses the case of a customer (and scheduling delivery dates on sales order lines) as an example. Note that at this point, you have already set up a base calendar.
Open the 
Customer Card window.
Page up or down to locate the customer for whom you will set up a customized calendar.
On the Shipping tab, fill in the Base Calendar Code field. Click the AssistButton to view the Base Calendar List window.
Select the base calendar that you want to assign to your customer and click OK.
When assigning a base calendar to your own company, the Base Calendar Code field is found under Company Information, Shipping tab.
When assigning a base calendar to a vendor, the Base Calendar Code field is found on the Vendor card, Receiving tab.
When assigning a base calendar to a location, the Base Calendar Code field is found on the Location card, Warehouse tab.
When assigning a base calendar to a shipping agent, the Base Calendar Code field is found on the Shipping Agent Services window under Warehouse Management, Setup.
If you do not assign a base calendar to a company, the program will calculate all dates as working days.
If you enter a blank location on an order line, the program will calculate all dates as working days.
Before you can make customized calendar entries, you must first assign a base calendar to the company.