# Detect epoch as Date field
**URL:** https://discuss.elastic.co/t/detect-epoch-as-date-field/258477
**Category:** Elasticsearch
**Created:** [December 12, 2020, 2:09pm UTC](https://discuss.elastic.co/t/detect-epoch-as-date-field/258477 "2020-12-12T14:09:49Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@lstoneir](https://discuss.elastic.co/u/lstoneir)
#### Post date: [December 12, 2020, 2:09pm UTC](https://discuss.elastic.co/t/detect-epoch-as-date-field/258477/1 "2020-12-12T14:09:49Z")
Hi every one,
i have an index (name: x-001) with a date field:
```auto
{
"time": {
"type": "date"
}
}
```
I insert docs into index like this:
```auto
time: 1607782041000
```
elasticsearch automatically convert epoch to datetime field and save!
I have created an ilm for rollover! after rollover and create new index like x-002
when i check the mapping of new index, i see that mapping is like this:
```auto
{
"time": {
"type": "long"
}
}
```
How can i fix this issue? How can i disable auto mapping?
---
### Author:  [@aaron-nimocks](https://discuss.elastic.co/u/aaron-nimocks)
#### Post date: [December 12, 2020, 3:24pm UTC](https://discuss.elastic.co/t/detect-epoch-as-date-field/258477/2 "2020-12-12T15:24:17Z")
You can create an [index template](https://www.elastic.co/guide/en/elasticsearch/reference/7.10/index-templates.html) if you need to keep as `date` vs `long`.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [January 9, 2021, 3:24pm UTC](https://discuss.elastic.co/t/detect-epoch-as-date-field/258477/3 "2021-01-09T15:24:25Z")
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