gnupg: set subkey expiration date in the past I would like to set the expiration date of a GPG subkey in the past, but `gpg --edit-key` does not allow me to. Is there any workaround to that? Rationale: it is useful to set the expiration date of a subkey in the past in order to temporarily disable it. If you just revoke it, you lose the ability to enable it again later on.

A possible workaround is to use `faketime` to convince `gnupg` to not complain. See this other question:


$ faketime 'last week' gpg2 --edit-key ABCDEF12


and then use ordinary commands to expire the subkey tomorrow. That "tomorrow" will actually be six days ago.