When I open Google chrome and acess social network like facebook,ymail,Gmail,twitter,my space etc. It would say like this below:
The server's security certificate is not yet valid!
You attempted to reach accounts.google.com, but the server presented a certificate that is not yet valid. No information is available to indicate whether that certificate can be trusted. Google Chrome cannot reliably guarantee that you are communicating with accounts.google.com and not an attacker. You should ensure that your clock and time zone are set correctly on your computer. If they are not, you should correct any issues and refresh this page. If they are correct, you should not proceed.
Please tell the process to access to valid certificate