Good evening, the idea is to return the complete date to be able to search the database correctly.
When I open the page it looks like this:
HomeWhenIclickthenextdayitlookslikethis: 
Apparentlycorrect,butIneedtheyearalsoforamorecorrectsearchintheDB.Hereisthecodeforhowit'sgetting:
$(document).ready(function() {
$(".b").click(function() {
$(".b").addClass("a");
$(this).removeClass("a");
var novothis = $(this);
$(".vaipa").text($(novothis).text().substring(5, 10));
});
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script><divclass="b">
<?php echo strftime('%a, %d/%m', strtotime('+0 day'));?>
</div>
<div class="a b">
<?php echo strftime('%a, %d/%m', strtotime('+1 day'));?>
</div>