His promotion is long 'overdue'. = He is long 'overdue' for a promotion. [=he should have been given a promotion by now]
Her baby is 'overdue' by one week. [=her baby has not been born yet and it is a week since its birth was expected]
She reminded him that the rent was 'overdue'.
(..) have a breakdown, you want to leverage it for your career. Listen, a changing of the guard is long overdue. I just wanted you to know that you have my support and that I know that the corporation's real interest in this place (..)2016 TvShow: Westworld Title: The Original Season: 1 Episode 1
(..) We don't update the hosts in cold storage and the park hasn't had a critical failure in over years. Meaning we're overdue. I'll go along, too. If it's one of mine, I might be able to help. They're only yours until they stop (..)2016 TvShow: Westworld Title: The Original Season: 1 Episode 1