# Logstash date filter for @timestamp and conversion
**URL:** https://discuss.elastic.co/t/logstash-date-filter-for-timestamp-and-conversion/195368
**Category:** Logstash
**Created:** [August 15, 2019, 3:59pm UTC](https://discuss.elastic.co/t/logstash-date-filter-for-timestamp-and-conversion/195368 "2019-08-15T15:59:26Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@griffer98](https://discuss.elastic.co/u/griffer98)
#### Post date: [August 15, 2019, 3:59pm UTC](https://discuss.elastic.co/t/logstash-date-filter-for-timestamp-and-conversion/195368/1 "2019-08-15T15:59:26Z")
I currently have a field called time which has a the time my file was created in this format: dd-MM-yyyy\_HHmmss. I would like to change the @timestamp to be the the time of file creation(time from my time field) instead of time it was read into logstash.
This is my date filter
```
date
{
match => ["Time" , "dd-MM-yyyy_HHmmss"]
target => "@timestamp"
}
```
I get a dateparsefailure. How do I get the date filter to change the timestamp not only to my new time but also convert the format something different?
---
### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [August 15, 2019, 4:27pm UTC](https://discuss.elastic.co/t/logstash-date-filter-for-timestamp-and-conversion/195368/2 "2019-08-15T16:27:16Z")
What does the [Time] field look like if you use this?
```
output { stdout { codec => rubydebug { } } }
```
In elasticsearch timestamps are stored as the number of milliseconds since the epoch. You can change the display format in Kibana. If you want to store a different string format you can use [ruby](https://discuss.elastic.co/t/converting-a-date-input-as-a-string-into-a-new-format/177498).
---
### Author:  [@griffer98](https://discuss.elastic.co/u/griffer98)
#### Post date: [August 15, 2019, 4:30pm UTC](https://discuss.elastic.co/t/logstash-date-filter-for-timestamp-and-conversion/195368/3 "2019-08-15T16:30:46Z")
Time looks like this: 03-DEC-2017\_140455
I want to convert it into ISO format and make it the @timestamp
---
### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [August 15, 2019, 5:21pm UTC](https://discuss.elastic.co/t/logstash-date-filter-for-timestamp-and-conversion/195368/4 "2019-08-15T17:21:31Z")
```
date { match => ["Time", "dd-MMM-YYYY_HHmmss"] }
```
MM matches numeric month 01-12. MMM matches the abbreviated name.
---
### Author:  [@griffer98](https://discuss.elastic.co/u/griffer98)
#### Post date: [August 15, 2019, 5:33pm UTC](https://discuss.elastic.co/t/logstash-date-filter-for-timestamp-and-conversion/195368/5 "2019-08-15T17:33:15Z")
Thank you! That was the problem
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [September 12, 2019, 5:33pm UTC](https://discuss.elastic.co/t/logstash-date-filter-for-timestamp-and-conversion/195368/6 "2019-09-12T17:33:19Z")
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