title: How to set date format for nginx $date_local
body: <p>According to <a href="http://nginx.org/en/docs/http/ngx_http_ssi_module.html#var_date_local" rel="nofollow">the docs</a> you can set the date format in nginx with the command <code>config timefmt</code> but I can't find any documentation/example on where or how to set that.</p>
  
  <p>The default shows a string like "Sunday, 26-Oct-2014 21:05:24 Pacific Daylight Time" and I want to change it to <code>yyyyMMdd</code></p>
  
  <p>I'm running nginx on Windows if that makes a difference.</p>
  
  <p>Thank you</p>