Example:

jdk.X509Certificate {
  startTime = 15:21:36.970
  ....
  validFrom = 06:47:28.000
  validUntil = 06:47:28.000
  eventThread = "main" (javaThreadId = 1)
  stackTrace
}

Most likely this due to validFrom and validUntil don't use ticks, but time since epoch.