text: const theme_settings = {
      '10-31': 'theme-halloween.css',
      '11-1': 'theme-halloween.css',
      '12-24': 'theme-christmas.css',
      '12-25': 'theme-christmas.css',
      '12-26': 'theme-christmas.css',
  }
  const theme_date = new Date();
  const date_key = (theme_date.getMonth()+1) + '-' + theme_date.getDate();
  
  if(date_key in theme_settings) {
      document.write('<link href="css/'+theme_settings[date_key]+'" rel="stylesheet">');
  } else {
      document.write('<link href="css/theme-normal.css" rel="stylesheet">');
  }