+Chaput turns 75 on September 26. His mandatory resignation will be accepted by Pope Francis at approximately 12:01 am on that date, whether or not it Chaput has formally tendered it. Bergoglio long ago drew a bead on him, specifically citing him to +Vigano as the sort of “right winger” he wanted gone.
It is a shame +Chaput has to retire while Pope Frank is still on the job.