Is Saturday a business day?
Well, in most Internet sites Saturday is a working day. Moreover, some of them offer lower prices if you order something on weekends
Saturday and Sunday are not generally considered to be business days. In the U.S., regular mail is delivered Monday through Saturday
For delivery companies:
Usually when we give a time quote, if we say 3–5 business days we are referring to Monday through Friday.
USPS delivers on Saturday if the business is open.
UPS and FedEx will deliver on Saturday for an extra fee.
Amazon delivers 7 days a week