# Add Default Date Format on Mapping

**URL:** <https://discuss.elastic.co/t/add-default-date-format-on-mapping/289341>\
**Category:** Elasticsearch\
**Created:** [November 16, 2021, 2:42pm UTC](https://discuss.elastic.co/t/add-default-date-format-on-mapping/289341 "2021-11-16T14:42:52Z")\
**Posts on this page:** 1\
**Showing post:** 5

<div class="post-metadata">

**Author:** ![stephenb](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/stephenb/32/40856_2.png) [@stephenb](https://discuss.elastic.co/u/stephenb)\
**Post date:** [November 16, 2021, 10:51pm UTC](https://discuss.elastic.co/t/add-default-date-format-on-mapping/289341/5 "2021-11-16T22:51:40Z")

</div>

I am confused ... this is a dynamic mapping ... it will create a flexible date fields for any field that it sees that matches the patterns...

```auto
PUT index-002
{
  "mappings": {
    "dynamic_date_formats": ["yyyy/MM/dd HH:mm:ss||yyyy/MM/dd||yyyy-MM-dd||epoch_millis"]
  }
}

POST /index-002/_doc
{
  "date": "2021/01/01"
}

POST /index-002/_doc
{
  "maybe_a_date": "2021-01-01"
}

```

flexible date fields

```auto
GET index-002

restults 
{
  "index-002" : {
    "aliases" : { },
    "mappings" : {
      "dynamic_date_formats" : [
        "yyyy/MM/dd HH:mm:ss||yyyy/MM/dd||yyyy-MM-dd||epoch_millis"
      ],
      "properties" : {
        "date" : {
          "type" : "date",
          "format" : "yyyy/MM/dd HH:mm:ss||yyyy/MM/dd||yyyy-MM-dd||epoch_millis"
        },
        "maybe_a_date" : {
          "type" : "date",
          "format" : "yyyy/MM/dd HH:mm:ss||yyyy/MM/dd||yyyy-MM-dd||epoch_millis"
        }
      }
    },
    "settings" : {
      "index" : {
        "routing" : {
          "allocation" : {
            "include" : {
              "_tier_preference" : "data_content"
            }
          }
        },
        "number_of_shards" : "1",
        "provided_name" : "index-002",
        "creation_date" : "1637102907427",
        "number_of_replicas" : "1",
        "uuid" : "tBrJs0A2QJq2GXyVjEOL4Q",
        "version" : {
          "created" : "7150299"
        }
      }
    }
  }
}

```

Your error would be solved using my solution...

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_[View the full topic](https://discuss.elastic.co/t/add-default-date-format-on-mapping/289341)._