The idea is to take a key and add it as subkey to another key. Using --key-edit/addkey with a specified keygrip could do that if there would only be a way to set an arbitrary creation date. --faked-system-time is probably not the way to go.
werner triaged this task as Low priority.Apr 19 2018, 5:24 PM2018-04-19 17:24:14 (UTC+2)
werner created this task.