Date.prototype.toRelativeString = function() {
	 
	  // Calculate difference between date and now
	  var today = parseInt((new Date()).getTime() / 1000);
	  var date = parseInt(this.getTime() / 1000);
	  var second_difference = today - date;
	  var day_difference = Math.floor(second_difference / 86400);
	  var when_text, one_off;
	 
	  // Determine if date is in future or past
	  if (second_difference < 0) {
	    when_text = ' from now';
	    one_off = 'Tomorrow';
	    second_difference = -second_difference;
	    day_difference = -day_difference
	  } else {
	    one_off = 'Yesterday';
	    when_text = ' ago';
	  }
	 
	  // Return relative string
	  if(day_difference == 0) {
	      if(second_difference < 60) {
	          return 'Just now';
	      } else if(second_difference < 120) {
	          return '1 minute' + when_text;
	      } else if(second_difference < 3600) {
	          return Math.floor(second_difference/60) + ' minutes' + when_text;
	      } else if(second_difference < 7200) {
	          return '1 hour' + when_text
	      } else if(second_difference < 86400) {
	          return Math.floor(second_difference/3600) + ' hours' + when_text;
	      }
	  } else if(day_difference == 1) {
	      return one_off;
	  } else if(day_difference < 7) {
	      return day_difference + ' days' + when_text;
	  } else if(day_difference == 7) {
	      return '1 week' + when_text;
	  } else if(day_difference < (7*6)) {
	      return Math.ceil(day_difference/7) + ' weeks' + when_text;
	  } else if(day_difference < 365) {
	      return Math.ceil(day_difference/(365/12)) + ' months' + when_text
	  } else {
	      years = Math.round(day_difference/365);
	      return years + ' year' + (years != 1 ? 's' : '') + when_text;
	  }
};