# Elasticsearch 6.2 - how to format date (epoch) field in yyyymm string in painless inline scripting

**URL:** <https://discuss.elastic.co/t/elasticsearch-6-2-how-to-format-date-epoch-field-in-yyyymm-string-in-painless-inline-scripting/133734>\
**Category:** Elasticsearch\
**Created:** [May 29, 2018, 6:22pm UTC](https://discuss.elastic.co/t/elasticsearch-6-2-how-to-format-date-epoch-field-in-yyyymm-string-in-painless-inline-scripting/133734 "2018-05-29T18:22:06Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![pungent](https://avatars.discourse-cdn.com/v4/letter/p/a698b9/32.png) [@pungent](https://discuss.elastic.co/u/pungent)\
**Post date:** [May 29, 2018, 6:22pm UTC](https://discuss.elastic.co/t/elasticsearch-6-2-how-to-format-date-epoch-field-in-yyyymm-string-in-painless-inline-scripting/133734/1 "2018-05-29T18:22:06Z")

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In Elasticsearch 6.2, I have an index where there are two timestamp fields as follows:

```
"start_ts": { "type": "date", "format": "epoch_second" },                       
"end_ts": { "type": "date", "format": "epoch_second" }  

```

In my painless inline script, for some calculation, I want to convert them (`doc["start_ts"]` and `doc["end_ts"]`) to this string format (`yyyymm`). Any idea how can it be done? I could not find any documentation for formatting in ES official documentation.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [June 26, 2018, 6:22pm UTC](https://discuss.elastic.co/t/elasticsearch-6-2-how-to-format-date-epoch-field-in-yyyymm-string-in-painless-inline-scripting/133734/2 "2018-06-26T18:22:09Z")

</div>

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