title: Querying by Date/Time in Mixpanel's JQL
body: <p>Currently I am under the impression that when using mixpanel's JQL, one can only query by date in this format YYYY-MM-DD like so:</p>
  
  <pre><code>function main() {
    return Events({
      from_date: '2019-03-19',
      to_date:   '2019-03-20',
      event_selectors: [{ 'event': 'signup' }]
    });
  }
  </code></pre>
  
  <p>This will return a JSON like this:</p>
  
  <pre><code>[
    {
      "name": "signup",
      "distinct_id": "1ce53208-e037-4c68-aac7-7a4e06d188a0",
      "labels": [],
      "time": 1451723182000,
      "sampling_factor": 1,
      "dataset": "$mixpanel",
      "properties": {
        "$email": "Elizabeth.Bryant@gmailx.com",
        "$import": true,
      }
    },
  ]
  </code></pre>
  
  <p>I'd like to know if it is possible to query not only by date but also by time using the default Mixpanel properties? 
  I realize one option would be to add a custom property to the event when its triggered that contains the date-time but I'd like to avoid adding duplicate data unnecessarily since the JSON already contains the <code>time</code> timestamp property.</p>