# Date filter configuration error
**URL:** https://discuss.elastic.co/t/date-filter-configuration-error/46147
**Category:** Logstash
**Created:** [April 3, 2016, 2:46am UTC](https://discuss.elastic.co/t/date-filter-configuration-error/46147 "2016-04-03T02:46:22Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@manishr](https://discuss.elastic.co/u/manishr)
#### Post date: [April 3, 2016, 2:46am UTC](https://discuss.elastic.co/t/date-filter-configuration-error/46147/1 "2016-04-03T02:46:22Z")
HI Guys,
I am trying to replace @timestamp with tstamp but it is not working. What am I missing here? Here is my configuration
```
date {
match => ["tstamp","yyyy-MM-dd'T'HH:mm:ss.SSSZ"]
target => "@timestamp"
}
```
and the sample date entry is like this
2016-04-02T09:29:50.348Z
2016-04-02T08:52:49Z
2016-04-02T02:52:50.000Z
---
### Author:  [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)
#### Post date: [April 4, 2016, 5:40am UTC](https://discuss.elastic.co/t/date-filter-configuration-error/46147/2 "2016-04-04T05:40:22Z")
You should be able to use the special ISO8601 pattern. The problem with your current pattern might be that the "Z" Joda-Time pattern can't parse the "Z" in the string. If the timezone is always "Z" you should be able to treat it like a literal and single-quote the "Z" in the pattern.
---
### Author:  [@manishr](https://discuss.elastic.co/u/manishr)
#### Post date: [April 4, 2016, 6:08am UTC](https://discuss.elastic.co/t/date-filter-configuration-error/46147/3 "2016-04-04T06:08:36Z")
Thanks @magnusbaeck, it is working fine. But what if I want to replace timestamp with a array field. Will it work like this
date {
match =\> ["[a].[b]","ISO8601"]
target =\> "@timestamp"
}
---
### Author:  [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)
#### Post date: [April 4, 2016, 6:14am UTC](https://discuss.elastic.co/t/date-filter-configuration-error/46147/4 "2016-04-04T06:14:05Z")
See [https://www.elastic.co/guide/en/logstash/current/event-dependent-configuration.html#logstash-config-field-references](https://www.elastic.co/guide/en/logstash/current/event-dependent-configuration.html#logstash-config-field-references) for the syntax for nested fields.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 5:04am UTC](https://discuss.elastic.co/t/date-filter-configuration-error/46147/5 "2017-07-06T05:04:10Z")