/**
* Get first letters in month
* @param mixed $num - number of month. Notice: 1 and 01 - the same things
* @param int $letters - count of FIRST letters in month name
* @return - first $letters in month with number $num
*/
public static function shortMonth($num, $letters = 3)
{
$month = Dates::month($num);
return mb_substr($month, 0, $letters, 'UTF-8');
}
