# Add a new field with a specifically formatted timestamp from @timestamp
**URL:** https://discuss.elastic.co/t/add-a-new-field-with-a-specifically-formatted-timestamp-from-timestamp/287373
**Category:** Logstash
**Created:** [October 21, 2021, 11:53pm UTC](https://discuss.elastic.co/t/add-a-new-field-with-a-specifically-formatted-timestamp-from-timestamp/287373 "2021-10-21T23:53:58Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@trwillis](https://discuss.elastic.co/u/trwillis)
#### Post date: [October 21, 2021, 11:53pm UTC](https://discuss.elastic.co/t/add-a-new-field-with-a-specifically-formatted-timestamp-from-timestamp/287373/1 "2021-10-21T23:53:58Z")
I want to take the value from @timestamp, format it like "yyyy MM dd HH:mm:ss" and prepend it to the message field. Input data is syslog in json format.
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### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [October 22, 2021, 12:25am UTC](https://discuss.elastic.co/t/add-a-new-field-with-a-specifically-formatted-timestamp-from-timestamp/287373/2 "2021-10-22T00:25:17Z")
To format a timestamp as a string, use a ruby filter and strftime. There is an example [here](https://discuss.elastic.co/t/changing-time-format/278115/2). To prepend it to the message field you can use
```
mutate { replace => { "message" => "%{[@metadata][someField]} %{message}" } }
```
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [November 19, 2021, 12:25am UTC](https://discuss.elastic.co/t/add-a-new-field-with-a-specifically-formatted-timestamp-from-timestamp/287373/3 "2021-11-19T00:25:22Z")
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