title: Mongodb ParseError with certain parameter
body: <p>My code is as follows:</p>
  
  <pre><code>var collection = db.collection(merged_client_collection);
      collection.findOne({_id: datetime.format("yyyy-MM-dd hh:00:00")}, function(err, doc) {
          if (err) {
              callback(err, doc);
          } else {
              callback(err, doc);
          }
      });
  </code></pre>
  
  <p>And it turns out with an error: "Error: parseError occurred"
  No idea what is wrong. It happens with some date time, but others is fine.</p>
  
  <p>Help.</p>