How to Fix NET::ERR_CERT_DATE_INVALID Certificate Expired Error

The NET::ERR_CERT_DATE_INVALID error is one of the most common SSL certificate issues that website administrators and users encounter. This error appears in Google Chrome when attempting to access a website with an expired SSL certificate, displaying the ominous "Your connection is not private" warning that immediately breaks user trust and prevents access to the site. While the error message might seem cryptic to non-technical users, it simply means that the SSL certificate's validity period has ended, and the browser refuses to establish a secure connection to protect users from potential security risks.

When this error occurs, visitors see a full-page warning in Chrome stating "Your connection is not private" with the NET::ERR_CERT_DATE_INVALID error code below. Similar errors appear in other browsers - Firefox displays "SEC_ERROR_EXPIRED_CERTIFICATE," Safari shows "This certificate is invalid," and Microsoft Edge presents "DLG_FLAGS_SEC_CERT_DATE_INVALID." Regardless of the browser, the impact remains the same: users cannot access your website, and there's no easy way for them to bypass this security warning in modern browsers.