openssl x509 -noout -dates

openssl x509 -noout -dates -in /tmp/ca.cert
notBefore=Nov 10 19:45:26 2022 GMT
notAfter=Nov  7 19:45:26 2032 GMT

Related

• How to check certification expiration date from command line
• openssl x509 -noout -subject

See also

• openssl x509[ -inform | -text | -dates | -subject | --help]
• X.509, ASN.1, openssl x509, .pem, der, PFX, PKCS, SAN, openssl x509, CSR