title: accepted way to send date and time with timezone parameter in URL
body: <p>In OData/REST service I want to allow date parameters <code>startDate</code> and <code>endDate</code> that marks the daterange of data returned. 
  Example: </p>
  
  <pre><code>GET /events?startDate=XXX&amp;endDate=YYY
  </code></pre>
  
  <p>Questions:  </p>
  
  <ol>
  <li>What are the standard formats for date and time in URL?  </li>
  <li>Should I consider adding a timezone (or UTC offset)? What is expected if timezone was not added?</li>
  </ol>