replace display day, month, etc with range function

range.php

<?php

// This is leading zeros:

$n = 10; // The desired end number

$numbers = range(1, $n);
$numbersWithLeadingZeros = array_map(function ($number) {
    return sprintf('%02d', $number);
}, $numbers);

// Just a range:

$numbers = range(1, $n);