JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/angular.js/1.3.14/angular.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/angular-filter/0.5.4/angular-filter.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/ramda/0.11.0/ramda.min.js"></script>
<div ng-app="myApp" ng-controller="DemoCtrl">
    <select name="day" ng-model="day" class="form-control" ng-required="true" required="required">
        <option value="21">21</option>
        <option value="22">22</option>
        <option value="23" selected="selected">23</option>
    </select>
</div>

JavaScript

var app = angular.module('myApp', []);

app.controller('DemoCtrl', function ($scope) {
   $scope.day = '' + (new Date()).getDate();
});