Carbon Macro For Laravel, Useful To Test For Valid Date.

macro.php

<?php

Carbon::macro('checkDate', function ($year, $month = null, $day = null) {
  if (isset($this)) {
    throw new \RuntimeException('Carbon::checkDate() must be called statically.');
  }

  if ($day === null) {
    [$year, $month, $day] = explode('-', $year);
  }

  return checkdate($month, $day, $year);
});