The-Hunt/app/static/assets/utils.js

function createDateTimePicker(datePicker, checkbox, date){
    $(datePicker).datetimepicker({
    //useCurrent: false, //Important! See issue #1075
    locale: 'en-gb',
    format: 'DD-MM-YYYY HH:mm',
    keepInvalid: true,
    sideBySide: true,
    defaultDate: null,
    timeZone: moment.tz.guess()
    });

    $(checkbox).change(function() {
        updateDateTimePicker(datePicker, checkbox)
    });

    if (!$(checkbox)[0].checked){
        if ($(datePicker)[0].value == ''){
            $(datePicker)[0].value = date.format('DD-MM-YYYY HH:mm');
        } else if (!$('.alert')[0]) { //Don't convert datetime again after error
            $(datePicker)[0].value = moment.utc($(datePicker)[0].value, 'DD-MM-YYYY HH:mm').local().format('DD-MM-YYYY HH:mm');
        }
    } else {
        $(datePicker).data("DateTimePicker").disable();
    };
}

function updateDateTimePicker(picker, checkbox){
    if ($(checkbox).prop("checked")) {
        $(picker).data("DateTimePicker").disable();
    }
    else {
        $(picker).data("DateTimePicker").enable();
        if ($(picker)[0].value == ''){
            $(picker)[0].value = moment().format('DD-MM-YYYY HH:mm');
        }
    }
}