title: PostgreSQL Date is one day off with my Query
body: <p>I am working on a React Native App with Expo that is connected to a PostgresDB.</p>
  
  <p>I have a query that loads some Data in between two dates it looks like this:</p>
  
  <pre><code>db.query(
        `SELECT activitydate, phaseid, time, userid, remark, zkub, status, hours_status.color status_color, comment, project.name project_name
        FROM hours 
        LEFT JOIN phase ON phase.id = hours.phaseid
        LEFT JOIN project ON project.id = phase.projectid 
        LEFT JOIN hours_status ON hours_status.statusid = hours.status
        WHERE activitydate &gt;= '${startDate}' AND activityDate &lt;= '${endDate}'
        AND userid = '${userid}' ORDER BY activitydate`
  
  ... startDate is 2019-08-01 and endDate is 2019-08-31 in this example ! 
  </code></pre>
  
  <p>It does give me back the data I need(example): </p>
  
  <pre><code>{"activitydate":"2019-07-31T22:00:00.000Z","phaseid":766x7,"time":180,"userid":1xx,"remark":"I did this and that","zkub":" ","status":0,"status_color":"000000","comment":"","project_name":"coolProject"}
  ... of course this is 1 Element from the Array ! 
  </code></pre>
  
  <p>Now the problem is that the activitydate should be : "2019-08-01" but it is "2019-07-31" even though it is safed correctly inside the db with the correct activitydate. </p>
  
  <p>Its not only wrong when I get the data in the browser with a localhost/api/... but it's also displayed wrong inside my app.</p>
  
  <p>I think it might have something to do with the Timestamp that is set? it is set to <code>T22:00:00.000Z</code> as you can see. I dont know which date the browser or nodejs(express) might be using but it puts the results 1 day behind.</p>