title: Regular expression is not valid
body: <p>this is my json from which I want to delete the date value.</p>
  
  <pre><code>      {
          "mCheckInTime": null,
          "mCheckOutTime": null,
          "mLateArrivalTime": "2017-09-14T18:00:00.000+05:00",
          "mNumberOfBeds": 0
        }
  </code></pre>
  
  <p>And this one is the coresponding regex </p>
  
  <pre><code>    String valueRegex = "^(\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}\\.\\d{3}\\+\\d{2}:\\d{2})$";
      String message = message.replaceAll(valueRegex, "");
  </code></pre>
  
  <p>And when I run this code, it does nothing.
  Anybody please help me in this issue, what is wrong here?</p>