# How to write grock pattern for date(\[yyyy-MM-dd HH:mm:ss.SSS z\] ) in logstash
**URL:** https://discuss.elastic.co/t/how-to-write-grock-pattern-for-date-yyyy-mm-dd-hh-mm-ss-sss-z-in-logstash/114295
**Category:** Logstash
**Created:** [January 5, 2018, 2:26pm UTC](https://discuss.elastic.co/t/how-to-write-grock-pattern-for-date-yyyy-mm-dd-hh-mm-ss-sss-z-in-logstash/114295 "2018-01-05T14:26:52Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@nitin59](https://discuss.elastic.co/u/nitin59)
#### Post date: [January 5, 2018, 2:26pm UTC](https://discuss.elastic.co/t/how-to-write-grock-pattern-for-date-yyyy-mm-dd-hh-mm-ss-sss-z-in-logstash/114295/1 "2018-01-05T14:26:52Z")
Hi,
In my log4j error logs, the datetime is printed in below format, I was trying to write a pattern in grock to parse that, but not getting the proper result.
[yyyy-MM-dd HH:mm:ss.SSS z]
ex. [2018-01-04 15:00:01.361 +0000UTC]
How can I parse such date and send this date as date type value so that I can create the filters as daterange in kibana?
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### Author:  [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)
#### Post date: [January 6, 2018, 5:25pm UTC](https://discuss.elastic.co/t/how-to-write-grock-pattern-for-date-yyyy-mm-dd-hh-mm-ss-sss-z-in-logstash/114295/2 "2018-01-06T17:25:41Z")
Have you tried using the grok constructor web site?
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [February 3, 2018, 5:25pm UTC](https://discuss.elastic.co/t/how-to-write-grock-pattern-for-date-yyyy-mm-dd-hh-mm-ss-sss-z-in-logstash/114295/3 "2018-02-03T17:25:42Z")
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