JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://raw.github.com/SteveSanderson/knockout/master/build/output/knockout-latest.debug.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.16/jquery-ui.min.js"></script>
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.16/themes/base/jquery-ui.css">
<div data-bind="with: SubViewModel">
    <input id="fisttextbox" data-bind="datepicker: Filter().From"/>
    <span data-bind="text: Filter().From"></span>
</div>

<div>
    <input id="secondtextbox" data-bind="datepicker: SubViewModel().Filter().From"/>
    <span data-bind="text: SubViewModel().Filter().From"></span>
</div>

JavaScript

function Filter() {
    var self = this;
    self.From = ko.observable("");
}

function SubViewModel() {
    var self = this;
    self.Filter = ko.observable(new Filter());
}

function ViewModel() {
    var self = this;
    self.SubViewModel = ko.observable(new SubViewModel());
}

var dateTimePickerOptions = {
        changeMonth: true,
        changeYear: true,
        dateFormat: "dd.mm.yy",
        showWeek: true
    };

ko.bindingHandlers.datepicker = {
    init: function (element, valueAccessor, allBindingsAccessor) {
        //initialize datepicker with some optional options
        $.datepicker.setDefaults({ dateFormat: 'yy-mm-dd' });
        var options = allBindingsAccessor().datepickerOptions || dateTimePickerOptions;
        $(element).datepicker(options);

        //handle the field changing
        ko.utils.registerEventHandler(element, "change", function () {
            var observable = valueAccessor();
            observable($.datepicker.formatDate($(element).datepicker('option', 'dateFormat'), $(element).datepicker("getDate")));
        });

        //handle disposal (if KO removes by the template binding)
        ko.utils.domNodeDisposal.addDisposeCallback(element, function () {
            $(element).datepicker("destroy");
        });
    },
    update: function (element, valueAccessor) {
        var value = ko.utils.unwrapObservable(valueAccessor());
        $(element).datepicker("setDate", value);
    }
};

var vm = new ViewModel();
ko.applyBindings(vm);