Quark_,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
td.background {
background-image: -webkit-linear-gradient(top, #FFFFFF, #000000);
background-image: linear-gradient(to bottom, #FFFFFF, #000000);
transition: .5s;
transform: scale(1.2);
}
td.background a{
color: #FFFFFF;
}
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script>
jQuery(function() {
jQuery('td').on('mouseenter mouseleave', 'a',function(event) {
event.delegateTarget.classList.toggle('background');
})
});
</script>
</head>
<body>
<table>
<tbody>
<tr class="days">
<td></td>
<td></td>
<td></td>
<td><a href=""/>ссылка</a></td>
<td></td>
<td></td>
<td><a href=""/>ссылка</a></td>
</tr>
</tbody>
</table>
</body>
</html>