# Timestamp and @timestamp not properly mapping

**URL:** <https://discuss.elastic.co/t/timestamp-and-timestamp-not-properly-mapping/99636>\
**Category:** Logstash\
**Created:** [September 6, 2017, 10:31pm UTC](https://discuss.elastic.co/t/timestamp-and-timestamp-not-properly-mapping/99636 "2017-09-06T22:31:16Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![kmsasidhar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kmsasidhar/32/21838_2.png) [@kmsasidhar](https://discuss.elastic.co/u/kmsasidhar)\
**Post date:** [September 7, 2017, 12:35am UTC](https://discuss.elastic.co/t/timestamp-and-timestamp-not-properly-mapping/99636/3 "2017-09-07T00:35:37Z")

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you can check this link as well for any hints:

> [@Help parsing \[06/Sep/2017:10:57:42 -0400\]](https://discuss.elastic.co/t/help-parsing-06-sep-2017-10-57-42-0400/99622):
>
> 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.

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