# Generate @timestamp in-logstash-by-concatenating-date-from-filename-and-time-from-logs
**URL:** https://discuss.elastic.co/t/generate-timestamp-in-logstash-by-concatenating-date-from-filename-and-time-from-logs/82556
**Category:** Logstash
**Created:** [April 17, 2017, 9:29am UTC](https://discuss.elastic.co/t/generate-timestamp-in-logstash-by-concatenating-date-from-filename-and-time-from-logs/82556 "2017-04-17T09:29:52Z")
**Posts on this page:** 3
**Page:** 2
### Author:  [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)
#### Post date: [May 16, 2017, 5:25am UTC](https://discuss.elastic.co/t/generate-timestamp-in-logstash-by-concatenating-date-from-filename-and-time-from-logs/82556/21 "2017-05-16T05:25:31Z")
Seems to be a known issue.
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### Author:  [@shammi](https://discuss.elastic.co/u/shammi)
#### Post date: [May 16, 2017, 5:49am UTC](https://discuss.elastic.co/t/generate-timestamp-in-logstash-by-concatenating-date-from-filename-and-time-from-logs/82556/22 "2017-05-16T05:49:53Z")
Oh ! I see. she was using the same logstash version 2.4.1
I will check by upgrading the logstash version.
Thanks for your help Magnus.!!
Cheers 🙂 👍
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [June 13, 2017, 5:57am UTC](https://discuss.elastic.co/t/generate-timestamp-in-logstash-by-concatenating-date-from-filename-and-time-from-logs/82556/23 "2017-06-13T05:57:20Z")
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