read value date time picker js code example
Example: getvalue data from datetimepicker
var date = $("#datetimepicker1").data("datetimepicker").getDate(),
formatted = date.getFullYear() + "-" + (date.getMonth() + 1) + "-" + date.getDate() + " " + date.getHours + ":" + date.getMinutes() + ":" + date.getSeconds();
alert(formatted);