We could only try a guess. If he got a 24-month sentence, the norm is doing 85% of the total. If that is true in his case, he'll do 20.4 months. if he has 100 days in, call that 3.3 months - 17.1 months would take us to July 2020
https://www.inmateaid.com/ask-the-inmate/my-boyfriend-was-sentenced-to-two-years-but-got-100-days-served-he-was-booked-september-19th-2018-whats-your-guess-on-when-he-will-get-out-because-he-keeps-getting-told-different-release-dates#answer
Accepted Answer Date Created: January 28,2019