There is possibility to use past date in the Date Required field at CA Service Catalog|Cart page|General Information Section.
This is not right from the process view.
Thanks for taking time and bringing your idea to this community. This idea is currently under review, and I would need more information to determine the business relevance.
Could you please elaborate on the idea by adding an example which sets the context from the standpoint of what problem a user is facing and how this idea address that problem.
Retrieving data ...