Your Connection is not private

So I face an error message from Chrome when trying to visit some websites: Your connection is not private Attackers might be trying to steal your information from [scam looking link removed] (for example, passwords, messages, bank information or credit cards). NET::ERR_CERT_DATE_INVALID

I am getting this error from past 20 days. I am not able to open wikipedia and many sites.. I have read many forums and tried many solutions but not yet resolved. Please give me a proper solution. Thanks in advance Keshav Gupta "www.wikipedia.org normally uses encryption to protect your...