# I can't find the GROK pattern of Time format?

**URL:** <https://discuss.elastic.co/t/i-cant-find-the-grok-pattern-of-time-format/144104>\
**Category:** Logstash\
**Created:** [August 13, 2018, 8:00am UTC](https://discuss.elastic.co/t/i-cant-find-the-grok-pattern-of-time-format/144104 "2018-08-13T08:00:59Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![med\_amine](https://avatars.discourse-cdn.com/v4/letter/m/a88e4f/32.png) [@med\_amine](https://discuss.elastic.co/u/med_amine)\
**Post date:** [August 13, 2018, 8:00am UTC](https://discuss.elastic.co/t/i-cant-find-the-grok-pattern-of-time-format/144104/1 "2018-08-13T08:00:59Z")

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hello evreyone ,

i can't find the GROK pattern of this Time format ;

Dec 17 00:00:01  
please help me to find it !!

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**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\
**Post date:** [August 13, 2018, 11:17am UTC](https://discuss.elastic.co/t/i-cant-find-the-grok-pattern-of-time-format/144104/2 "2018-08-13T11:17:55Z")

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Have you tried using [http://grokconstructor.appspot.com/do/construction](http://grokconstructor.appspot.com/do/construction) to find a matching pattern?

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**Author:** ![chandra0651](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/chandra0651/32/30484_2.png) [@chandra0651](https://discuss.elastic.co/u/chandra0651)\
**Post date:** [August 14, 2018, 7:10pm UTC](https://discuss.elastic.co/t/i-cant-find-the-grok-pattern-of-time-format/144104/3 "2018-08-14T19:10:48Z")

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Use some thing like below

`(?<TIMESTAMP>%{MONTH:month} %{MONTHDAY:day} %{TIME:time})`

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [September 11, 2018, 7:10pm UTC](https://discuss.elastic.co/t/i-cant-find-the-grok-pattern-of-time-format/144104/4 "2018-09-11T19:10:48Z")

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