$(document).ready(function() { 
var now = new Date();
if((now.getHours() >=4) && (now.getHours() <=12)) {
    var goodDay = $('h1.message');
    goodDay.text('Good morning ...');
} 
if ((now.getHours() >=12) && (now.getHours() <=18)){
	var goodDay = $('h1.message');
    goodDay.text('Good afternoon ...');
  }
if ((now.getHours() >=18) && (now.getHours() <=23)){
	var goodDay = $('h1.message');
    goodDay.text('Good evening ...');
  }
if ((now.getHours() >=0) && (now.getHours() <4)){
	var goodDay = $('h1.message');
    goodDay.text('Good evening ...');
  }
});