# ILM, creation\_date and reindexing

**URL:** <https://discuss.elastic.co/t/ilm-creation-date-and-reindexing/297469>\
**Category:** Elasticsearch\
**Tags:** ilm-index-lifecycle-management\
**Created:** [February 17, 2022, 10:02am UTC](https://discuss.elastic.co/t/ilm-creation-date-and-reindexing/297469 "2022-02-17T10:02:27Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![dakrone](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dakrone/32/23351_2.png) [@dakrone](https://discuss.elastic.co/u/dakrone)\
**Post date:** [February 22, 2022, 6:19pm UTC](https://discuss.elastic.co/t/ilm-creation-date-and-reindexing/297469/5 "2022-02-22T18:19:15Z")

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You can use the index setting `index.lifecycle.origination_date` to set a custom "age" for the index, so that if you were to reindex, you can tell ILM that it is a certain age without waiting for that long.

Here's a blog post about it: [Control the phase transition timings in ILM using the origination date | Elastic Blog](https://www.elastic.co/blog/control-ilm-phase-transition-timings-using-origination-date)

And the reference documentation: [Index lifecycle management settings in Elasticsearch | Elasticsearch Guide [8.0] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/8.0/ilm-settings.html#_index_level_settings)

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