# Use parsed date/time fields to prepare @timestamp
**URL:** https://discuss.elastic.co/t/use-parsed-date-time-fields-to-prepare-timestamp/128984
**Category:** Logstash
**Created:** [April 22, 2018, 2:01am UTC](https://discuss.elastic.co/t/use-parsed-date-time-fields-to-prepare-timestamp/128984 "2018-04-22T02:01:33Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Saurabh\_Jinturkar](https://discuss.elastic.co/u/Saurabh_Jinturkar)
#### Post date: [April 22, 2018, 2:01am UTC](https://discuss.elastic.co/t/use-parsed-date-time-fields-to-prepare-timestamp/128984/1 "2018-04-22T02:01:33Z")
Hi,
I am trying to parse HAProxy logs in Logstash. I am using standard pattern available [here](https://github.com/logstash-plugins/logstash-patterns-core/blob/master/patterns/haproxy) to parse the log. Filter is parsing date however, I want to use those fields to create a timestamp for the log.
Do I need to use date filter plugin or is it possible through something else? Any pointers on this are welcome.
Thank you!
---
### Author:  [@MariumHassan](https://discuss.elastic.co/u/MariumHassan)
#### Post date: [April 23, 2018, 5:39am UTC](https://discuss.elastic.co/t/use-parsed-date-time-fields-to-prepare-timestamp/128984/2 "2018-04-23T05:39:45Z")
Hi,
you can use [date filter plugin](https://www.elastic.co/guide/en/logstash/current/plugins-filters-date.html) if you want to use your field to create a timestamp for your logs.
```auto
filter {
date {
match => ["logdate", "MMM dd yyyy HH:mm:ss"]
}
}
```
It stores the matching timestamp into the @timestamp field of the event if the target field is not provided.
---
### Author:  [@Saurabh\_Jinturkar](https://discuss.elastic.co/u/Saurabh_Jinturkar)
#### Post date: [April 23, 2018, 6:25pm UTC](https://discuss.elastic.co/t/use-parsed-date-time-fields-to-prepare-timestamp/128984/3 "2018-04-23T18:25:56Z")
Thanks for the help!
Can I combine already parsed fields? For example, HAProxy pattern matches and creates fields year, monthday, month, hour, minutes and second. I just want to combine them to form the date since they are already matched.
---
### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [April 23, 2018, 6:34pm UTC](https://discuss.elastic.co/t/use-parsed-date-time-fields-to-prepare-timestamp/128984/4 "2018-04-23T18:34:30Z")
Yes, you can use add\_field in most filters and use [sprintf notation](https://www.elastic.co/guide/en/logstash/current/event-dependent-configuration.html) to reference field values to insert.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 21, 2018, 6:34pm UTC](https://discuss.elastic.co/t/use-parsed-date-time-fields-to-prepare-timestamp/128984/5 "2018-05-21T18:34:36Z")
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