Amazon Press Release:

Amazon is bringing a new level of delivery convenience and predictability to Prime members with the launch of Amazon Day, available today to all Prime members in the U.S. This new delivery innovation enables Prime members to choose a day of the week to be their delivery day, which makes it easier to get purchases grouped and delivered together and, in many cases, in fewer packages. Members can also choose from Prime’s fast, free shipping options for any item they don’t want to include as part of their Amazon Day shipment. The program is one of many sustainability initiatives to help achieve Shipment Zero, the company’s vision to make all Amazon shipments net zero carbon, with 50% of all shipments net zero by 2030.

This isn't a terrible idea, really. I know that, personally, a lot of things which I order via Prime aren't necessarily "needed" as soon as I order them.

Not a bad idea, Bezos & Co.!