title: Cant get Moment .isBetween() to work properly
body: <p>I am trying to verify that dates from a Db is not overlapping with event dates from Full Calender. The inputs are all strings from the beginning. The moment().isBetween() always gives false no matter what. What am I doing wrong? </p>
  
  <pre><code>var format = 'YYYY-MM-DD h:mm',
              start = "2017-12-08 09:00",
              end = "2017-12-08 10:00",
              checkStart = "2017-12-08 09:00";
  
              var startDate = moment(start).format(format),
                  endDate = moment(end).format(format);
  
              var startDatetoCheck = moment(checkStart).format(format),
                  endDateToCheck = moment(checkStart).add(1, 'hours').format(format);
  
              var bool1 = moment(checkStart).isBetween(moment(start).format(format), moment(end).format(format));
              var bool2 = moment(endDateToCheck).isBetween(moment(start).format(format), moment(end).format(format));
  </code></pre>