Prior to hearing oral argument, other business of the Court is transacted. On Monday mornings this includes the release of an Order List, a public report of Court actions including the acceptance and rejection of cases, and the admission of new members to the Court Bar. Opinions are typically released on Tuesday and Wednesday mornings and on the third Monday of each sitting, when the Court takes the Bench but no arguments are heard.

https://www.supremecourt.gov/about/procedures.aspx