This in turn means that you can't pull any docker images if they're on the public index, e.g:

:~ $ sudo docker pull debian Pulling repository debian 2015/03/20 23:42:18 Get https://index.docker.io/v1/repositories/debian/images: x509: certificate has expired or is not yet valid

Thankfully it's a Friday night, so I'm taking this as a hint to start my weekend :)