# Invalid format of timestamp

**URL:** <https://discuss.elastic.co/t/invalid-format-of-timestamp/94238>\
**Category:** Elasticsearch\
**Created:** [July 23, 2017, 11:39am UTC](https://discuss.elastic.co/t/invalid-format-of-timestamp/94238 "2017-07-23T11:39:19Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![xavierfacq](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/xavierfacq/32/8744_2.png) [@xavierfacq](https://discuss.elastic.co/u/xavierfacq)\
**Post date:** [July 23, 2017, 12:34pm UTC](https://discuss.elastic.co/t/invalid-format-of-timestamp/94238/2 "2017-07-23T12:34:27Z")

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Hi,

Your format is not valid, check here:

[https://www.elastic.co/guide/en/elasticsearch/reference/5.5/mapping-date-format.html#mapping-date-format](https://www.elastic.co/guide/en/elasticsearch/reference/5.5/mapping-date-format.html#mapping-date-format)

and here

[http://www.joda.org/joda-time/apidocs/org/joda/time/format/DateTimeFormat.html](http://www.joda.org/joda-time/apidocs/org/joda/time/format/DateTimeFormat.html)

Month is MM

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_[View the full topic](https://discuss.elastic.co/t/invalid-format-of-timestamp/94238)._