The Day-Date is Rolex's flagship watch collection, and it is exclusively crafted from either solid 18k gold or 950 platinum. In addition to its more complicated movement that displays both the date and the day of the week - spelled out in full, the Rolex Day-Date is expensive due to the premium nature of it materials. With the exception of a few extremely rare vintage models, the Rolex Day-Date has never been offered in either stainless steel or two-tone configurations.