title: fasttime not returning actual date from character in R
body: <p>This seems very simple, but fasttime package is not working to convert dates.</p>
  
  <pre><code>library(fasttime)
  z="2011-01-01"
  
  fastPOSIXct(z)
  &gt;"2010-12-31 18:00:00 CST"
  </code></pre>
  
  <p>Can someone explain what is happening or what I have missed?</p>