If you want to get the expiration date for an ssl certificate on a website, you can run the following command:

curl -vI https://www.example.com 2>&1 | grep "expire date"

But if the website is not live (dns is not pointing that way), you can make a curl request as if some resolve
combination ip-address / domain name is in your hostfile. (without putting it in your hostfile)

curl -vI https://www.example.com --resolve 'www.example.com:443:188.114.87.0' 2>&1 | grep "expire date"

The resolve argument sets the curl environment if an https call is made to example.com to use the ip mentioned after 443:
the format for resolve is: domain:port:ip