I’m glad to see the problem is resolved. I’ll clear the status.io message.
$ echo | openssl s_client -connect wiki.gnome.org:443 -servername wiki.gnome.org 2>/dev/null | openssl x509 -noout -startdate -enddate
notBefore=Aug 5 15:44:58 2019 GMT
notAfter=Nov 3 15:44:58 2019 GMT