The exact out-date should be on the papers he received. There is normally about a 60 - 120 day lag time from notice to release
https://www.inmateaid.com/ask-the-inmate/my-husband-received-his-parole-papers-as-well-as-address-approval-how-long-until-he-would-be-released#answer
Accepted Answer Date Created: September 13,2017