title: How do you change the timezone of Sys.time()
body: <p>I am in the PDT timezone and I want to change  the variable "s" to the GMT timezone.  Any idea how?</p>
  
  <pre><code>s&lt;-Sys.time()
  s
  as.POSIXct(s,"GMT")
  </code></pre>
  
  <p>OUTPUT</p>
  
  <pre><code>&gt; s&lt;-Sys.time()
  &gt; s
  [1] "2015-06-17 17:56:17 PDT"
  &gt; as.POSIXct(s,"GMT")
  [1] "2015-06-17 17:56:17 PDT" # &lt;--  how do I get this in GMT??
  </code></pre>