SSL PEM Expiration January 6, 2022 Find out when SSL expires from a PEM file. $ openssl x509 -enddate -noout -in your.cert notAfter=Jan 5 07:08:14 2032 GMT$ openssl x509 -enddate -noout -in your.cert notAfter=Jan 5 07:08:14 2032 GMT notAfter date is returned.