I am using a gpg key I added in 2017 to sign my commits and never had problems until now. I update the expiry date locally to keep it up-to-date.
I realised today that my commits are suddenly marked as unverified with the given reason that the key is expired.
On my machine the key is still valid until January 2021 (I always add a month) and git says the commits are signed correctly.
Does anybody have an idea what could cause this problem?
To see a repository where it happens you can check here: