Hi NULLPLAYER,
Check this example. Now please take its reference and correct your code.
HTML
<html>
<head>
<meta charset="utf-8" />
<title></title>
</head>
<body>
<input id="txtdateTime" type="text" readonly="readonly">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/jquery-datetimepicker/2.5.20/jquery.datetimepicker.css" />
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery-datetimepicker/2.5.20/jquery.datetimepicker.full.min.js "></script>
<script type="text/javascript">
$(function () {
$('[id*=txtdateTime]').datetimepicker({
inline: false,
showsTime: true,
format: 'Y/m/d H:i',
formatTime: 'H:i',
formatDate: 'Y/m/d',
startDate: false,
maxDate: 0,
step: 1,
closeOnDateSelect: false,
closeOnTimeSelect: true
});
});
</script>
</body>
</html>
Demo
For more details refer below link.
https://www.jqueryscript.net/time-clock/Clean-jQuery-Date-Time-Picker-Plugin-datetimepicker.html