GMT Timezone to CST in logstash

Elastic Stack Logstash
6

This works as expected for me:

$ cat test.config 
input { stdin { } }
output { stdout { codec => rubydebug } }
filter {
  date {
    match => ["message", "yyyy-MM-dd HH:mm:ss.SSSS"]
    timezone => "Etc/UTC"
  }
}
$ echo '2017-02-16 06:52:31.5999' | /opt/logstash/bin/logstash -f test.config
Settings: Default pipeline workers: 8
Pipeline main started
{
       "message" => "2017-02-16 06:52:31.5999",
      "@version" => "1",
    "@timestamp" => "2017-02-16T06:52:31.599Z",
          "host" => "lnxolofon"
}
Pipeline main has been shutdown
stopping pipeline {:id=>"main"}