Copy date in a Text Field to a date field

My clients data for DOC DATE is stored in a text field as follows:  01252019
Does anyone know how I can copy this to a true data field so it comes out: 01/25/2019 ?  (Standard US date formatting)
I built a workflow to copy the field but due to the format, it shows up as today's date.

If you have true Workflow, you can do this.  Unfortunately CDate does not seem to support this type string so it has to be converted first.