How to find the day of the week from timestamp

Elastic Stack Logstash
1

Hi,

I have a timestamp 2015-11-01 21:45:25,296 like I mentioned above. is it possible to extract the the day of the week(Mon, Tue,etc) using any regular expression or grok pattern.

Thanks in advance

2

I don't believe there is anything native to ES to do this, dunno if you can do something with ruby code though.