JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/angular-material/1.0.5/angular-material.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.8/angular-messages.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.8/angular-animate.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.8/angular-aria.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular-material/1.0.5/angular-material.min.js"></script>
<body ng-app="DatePick">
  <div ng-controller="Pick">
    <md-datepicker ng-model="date"></md-datepicker>
    {{date}}
    <button ng-click="prevDay()">-</button>
    <button ng-click="nextDay()">+</button>
  </div>
</body>

JavaScript

angular.module('DatePick', ['ngMaterial']);

angular.module('DatePick').controller('Pick', function($scope) {
  $scope.date = new Date();
  $scope.nextDay = function() {
    $scope.date.setDate($scope.date.getDate() + 1);
  };
  $scope.prevDay = function() {
    $scope.date.setDate($scope.date.getDate() - 1);
  };
});