# Create monthly indexes based on event attribute

**URL:** https://discuss.elastic.co/t/create-monthly-indexes-based-on-event-attribute/29372
**Category:** Logstash
**Created:** [September 16, 2015, 8:23am UTC](https://discuss.elastic.co/t/create-monthly-indexes-based-on-event-attribute/29372 "2015-09-16T08:23:40Z")
**Posts on this page:** 1
**Showing post:** 1

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### Author: ![karasmeitar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/karasmeitar/32/35703_2.png) [@karasmeitar](https://discuss.elastic.co/u/karasmeitar)
#### Post date: [September 16, 2015, 8:23am UTC](https://discuss.elastic.co/t/create-monthly-indexes-based-on-event-attribute/29372/1 "2015-09-16T08:23:40Z")

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Hi All,  
can i perform JODA functions in the output section on other attributes then timestamp(%{+YYYY.MM})?  
i need to create indexes base on couple of attributes in my event and i can't use only the timestamp.

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