After restarting my computer today, It reset the time automatically to an outdated one. Eager I was to check my Gmail and Facebook account, while entering the URL in the browser I got the following errors : The certificate will not be valid until 5/18/12 3:00 AM. The current time is 1/1/01 8:44 PM.
(Error code: sec_error_expired_issuer_certificate).
My machine had the 1/1/01 set as date meaning that many  webservers could not authenticate to my web browser because of an outdated time leading to an expired certificates. The only way to fix it was to adjust the time accordingly and there I enjoyed my Facebook again and again.