title: How can I “unparse” a date in a specific time zone?
body: <p>Using clj-time, I can parse a date and time by doing</p>
  
  <pre><code>(def timestamp (format/parse (formatters :date-time-no-ms)
                               "2013-06-03T23:00:00-0500"))
  ;=&gt; #&lt;DateTime 2013-06-04T04:00:00.000Z&gt;
  </code></pre>
  
  <p>I can convert this back into a string by doing</p>
  
  <pre><code>(unparse (formatters :year-month-day) timestamp)
  ;=&gt; "2013-06-04"
  </code></pre>
  
  <p>This is the year, month, and day of that moment within the UTC time zone. How can I get an unparsed version of the <code>DateTime</code> relative to another time zone? For example, for the example above, I want to specify the UTC–5 time zone and get a string of “2013-06-03”. I have played around with <code>from-time-zone</code> and <code>to-time-zone</code> but can’t seem to find the right combination of functions and arguments.</p>