title: What is the format of datetime in GET requests?
body: <p>Some requests to GitLab API, like listing Merge Requests (<a href="https://docs.gitlab.com/ee/api/merge_requests.html#list-merge-requests" rel="nofollow noreferrer">https://docs.gitlab.com/ee/api/merge_requests.html#list-merge-requests</a>) allow for URL query parameters of <code>datetime</code> type (<code>created_after</code> and <code>created_before</code> params for this particular example).</p>
  
  <p>I can't seem to find a format for the <code>datetime</code> param that would work. Timestamps (both with and without milliseconds) doesn't work, nor do the ISO format like <code>2017-06-29T11:00:00.000Z</code>.</p>
  
  <p>Maybe this query parameter doesn't work at all?</p>