# Date\_histogram interval versus fixed\_interval and calendar\_interval

**URL:** <https://discuss.elastic.co/t/date-histogram-interval-versus-fixed-interval-and-calendar-interval/310733>\
**Category:** Elasticsearch\
**Created:** [July 27, 2022, 9:35am UTC](https://discuss.elastic.co/t/date-histogram-interval-versus-fixed-interval-and-calendar-interval/310733 "2022-07-27T09:35:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sbruinsje](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sbruinsje/32/108568_2.png) [@sbruinsje](https://discuss.elastic.co/u/sbruinsje)\
**Post date:** [July 27, 2022, 9:35am UTC](https://discuss.elastic.co/t/date-histogram-interval-versus-fixed-interval-and-calendar-interval/310733/1 "2022-07-27T09:35:45Z")

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I am upgrading to elasticsearch 8 which doesn't support the `interval` on `date_histogram` anymore. Instead it expects a `fixed_interval` or `calendar_interval`.

I am a bit confused about the old `interval` field. Does `interval: 'month'` in previous elasticsearch versions correspond to `fixed_interval: 'month'` or `calendar_interval: 'month'` in elasticsearch 8?

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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:** [August 24, 2022, 9:36am UTC](https://discuss.elastic.co/t/date-histogram-interval-versus-fixed-interval-and-calendar-interval/310733/2 "2022-08-24T09:36:25Z")

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