Hi @ikazi
You need to save the month in a temporary variable and then check if the current month is the same with the one in the temporary variable or not. Maybe something like this:
<?php if( $the_query->have_posts() ): ?>
<?php $current_month = ""; ?>
<ul>
<?php while( $the_query->have_posts() ) : $the_query->the_post(); ?>
<li class="list-representations">
//month display tag
<div class="list-separator-month">
<h2>
<?php
$dateformatstring = "F Y";
$unixtimestamp = strtotime(get_field('date_start'));
$pretty_month = date_i18n($dateformatstring, $unixtimestamp);
if ($current_month != $pretty_month){
echo $pretty_month;
$current_month = $pretty_month;
}
?>
</h2>
</div>
<article>
Hope this helps.
