Timestamp and @timestamp not properly mapping

[kmsasidhar (SasidharReddy)]

you can check this link as well for any hints:

Help parsing [06/Sep/2017:10:57:42 -0400]

Hello, I am using the following regex to parse out [06/Sep/2017:10:57:42 -0400] [0-9]{2}/[A-z]{3}/[0-9]{4}:[0-9]{2}:[0-9]{2}:[0-9]{2} -[0-9]{4} I used the HTTPDATE grok, but this is placing my timestamp in a CST timezone instead of EST. I am not understanding why logstash is throwing an error on this regex when it is breaking the data as intended. Thanks.