why can't i get on twitter?

[nerdfighter]

i try to go on twitter and comes to this instead:

"The server's security certificate is not yet valid!
You attempted to reach twitter.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 twitter.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.
You cannot proceed because the website operator has requested heightened security for this domain."

what does it mean? and how do i get back on twitter? or is this happening to everyone?
i don't know! thanks in advance! xxx
p.s. all other website are fine!
DOH! it was in 2003 :L! thank you so much

[nerdfighter]

check the date and time on your computer , and set it to the real time and it will work.