Meeting Days

<?php
date_default_timezone_set('Europe/Sofia');
$dateOne = DateTime::createFromFormat('d-m-Y', $_GET['dateOne']);
$dateTwo = DateTime::createFromFormat('d-m-Y', $_GET['dateTwo']);

$startDate = $dateOne;
$endDate = $dateTwo;
if ($dateOne > $dateTwo) {
    $startDate = $dateTwo;
    $endDate = $dateOne;
}

$thursdayList = array();
$date = $startDate;
while ($date <= $endDate) {
    if ($date->format('l') == 'Thursday') {
        array_push($thursdayList, $date->format('d-m-Y'));
        date_add($date, date_interval_create_from_date_string('6 days'));
    }

    date_add($date, date_interval_create_from_date_string('1 day'));
}

if (count($thursdayList) < 1) {
    die('<h2>No Thursdays</h2>');
}

echo '<ol>';
foreach ($thursdayList as $thursday) {
    echo "<li>{$thursday}</li>";
}
echo '</ol>';