On a list view, can I create a way for users to filter the list based on adhoc date ranges?

How is your list currently populated? That is, does it come from a SQL stored proc, SQL table, static list...? I don't think the out-of-box filters can do what you want, but you can create two date fields on the form and use those either as parameters or filters when populating the list.

The list is populated with individual instances from a SmartObject. It doesn't come from a SQL stored proc, table or static list. I was thinking that the out-of-the-box filters couldn't do what I want, but wanted to confirm. Thank you