<a href="" title="ТЕКСТ"><div class="article9">
    <img src="/images/logo.png" alt="текст">
        <for>Какой-то текст</for>
</div></a>

function setNewYearBg() {
  var now = new Date(),
      month = now.getMonth(),
      day = now.getDate(),
  if( (month == 11 && day >= 25) || (month == 11 && day <= 28 ) ) {

  }
  else if( (month == 11 && day == 29 ) ) {
        document.body.classList.add('newyear_sunset');
  }
}

setNewYearBg();

.article9 {
    url(www.google.ru);
    ...
}

.article9:hover {
    url(www.google.ru);
    ...
}

.article9 for {
    ...
}

.article9:hover for {
    ...
}

.article9>img {
    ...
}