How can I use the "Date and Time" Field Type to schedule release date of database rows?

You will need a bit of coding for this. I do not know against which date(s) you would like to publish. It could be against Today end everything later, it could be against “Today” until “Tomorrow”, you did not tell.
The basic thing is that you will have to build a simple query which uses “.ge” for first possibility or “.between” for second.
Then you throw the query’s result to the repeater (the repeater’s .data property) and Bob’s your uncle.