# Invalid format, date is malformed

**URL:** <https://community.graylog.org/t/invalid-format-date-is-malformed/10829>\
**Category:** Graylog Central (peer support)\
**Created:** [June 18, 2019, 8:33am UTC](https://community.graylog.org/t/invalid-format-date-is-malformed/10829 "2019-06-18T08:33:58Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![xingsd163](https://avatars.discourse-cdn.com/v4/letter/x/ecd19e/32.png) [@xingsd163](https://community.graylog.org/u/xingsd163)\
**Post date:** [June 18, 2019, 8:33am UTC](https://community.graylog.org/t/invalid-format-date-is-malformed/10829/1 "2019-06-18T08:33:59Z")

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Hi,

I am new to Graylog, encountered an error, but failed to resolve it. Please help.

Source log:  
91.205.189.15 - - [25/May/2019:18:13:32] “POST /cart.do?action=addtocart&itemId=EST-21&productId=WC-SH-A01&JSESSIONID=SD10SL4FF1ADFF53066 HTTP 1.1” 200 3061 “[http://www.buttercupgames.com/product.screen?productId=WC-SH-A01](http://www.buttercupgames.com/product.screen?productId=WC-SH-A01)” “Mozilla/5.0 (Macintosh; Intel Mac OS X 10\_7\_4) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.46 Safari/536.5” 559

Use an extractor to extract the timestamp, and use a date converter to convert the date:

Format string: dd/MM/yyyy:HH:mm:ss

 ![Capture](https://us1.discourse-cdn.com/flex016/uploads/graylog/original/2X/6/61d0bb4139e2069c4077452d45b782e847fbe6dd.png)

checked the server.log and found this error:

2019-06-18T08:20:26.714Z ERROR [Extractor] Could not apply converter [DATE] of extractor [fd013270-90e7-11e9-a001-000c295591a0].  
java.lang.IllegalArgumentException: Invalid format: “25/May/2019:18:20:55” is malformed at “May/2019:18:20:55”  
at org.joda.time.format.DateTimeFormatter.parseDateTime(DateTimeFormatter.java:945) ~[graylog.jar:?]  
at org.joda.time.DateTime.parse(DateTime.java:160) ~[graylog.jar:?]  
at org.graylog2.inputs.converters.DateConverter.convert(DateConverter.java:87) ~[graylog.jar:?]

Anyone can help point the reason? Thanks!!

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<div class="post-metadata">

**Author:** ![jan](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/jan/32/11_2.png) [@jan](https://community.graylog.org/u/jan)\
**Post date:** [June 18, 2019, 10:50am UTC](https://community.graylog.org/t/invalid-format-date-is-malformed/10829/2 "2019-06-18T10:50:57Z")

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did you checked what the extractor with the regex outputs?

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**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/graylog/original/3X/c/7/c7c09c6b5099570133d6502b83f50ba4430de5b6.png) [@system](https://community.graylog.org/u/system)\
**Post date:** [July 2, 2019, 10:51am UTC](https://community.graylog.org/t/invalid-format-date-is-malformed/10829/3 "2019-07-02T10:51:00Z")

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