Site showing this error : NET::ERR_CERT_DATE_INVALID

My domain is:

My web server is (include version): Apache2

The operating system my web server runs on is (include version): Windows Server 2012

For most the cert is valid, but a few get NET::ERR_CERT_DATE_INVALID. It's happening for example one someone's new iPhone 12, both on safari and chrome.

Hi @Valleriani and welcome to the LE community forum :slight_smile:

Your site is only serving the end leaf cert:

Certificate chain
 0 s:CN =
   i:C = US, O = Let's Encrypt, CN = R3

Which typically means you are using the cert.pem file instead of the fullchain.pem file.
But because you are using Apache on Windows Server 2012...
I can't be altogether certain on how you are obtaining certs nor their file names.
But the basic idea remains in place - it needs to serve the cert + the chain (not just the cert).


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