<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <script src="http://momentjs.com/downloads/moment-with-locales.js"></script> <script src="http://momentjs.com/downloads/moment-timezone-with-data.js"></script> Time Zone: Europe/London <div class="container" style="margin-top:70px;"> <div class="row"> <form class="form-horizontal col-sm-7 col-sm-offset-2" action="" method="post"> <div class="form-group registration-date"> <label class="control-label col-sm-3" for="registration-date">Date:</label> <div class="input-group registration-date-time"> <span class="input-group-addon" id="basic-addon1"><span class="glyphicon glyphicon-calendar" aria-hidden="true"></span></span> <input class="form-control" name="registration_date" id="registration-date" type="date"> <span class="input-group-addon" id="basic-addon1"><span class="glyphicon glyphicon-time" aria-hidden="true"></span></span> <input class="form-control" name="registration_time" id="registration-time" type="time"> <span class="input-group-btn"> <button class="btn btn-default" type="button" onclick="addNow()"><span class="glyphicon glyphicon-map-marker" aria-hidden="true"></span> Now</button> <button class="btn btn-default" type="button" onclick="stopNow()"><span class="glyphicon glyphicon-minus-sign" aria-hidden="true"></span> Stop</button> </span> </div> </div> </form> </div> </div>

function addNow() { nowDate = moment().tz("America/Los_Angeles").format('YYYY-MM-DD'); nowTime = moment().tz("America/Los_Angeles").format('HH:mm:ss'); document.getElementById('registration-date').value = nowDate; document.getElementById('registration-time').value = nowTime; set = setTimeout(function () { addNow(); }, 1000); } function stopNow() { clearTimeout(set); }