<?PHP
declare(strict_types = 1);
$day_of_week = array (
  'monday' => 'Montag',
  'tuesday' => 'Dienstag',
  'wednesday' => 'Mittwoch',
  'thursday' => 'Donnerstag',
  'friday' => 'Freitag',
  'saturday' => 'Samstag',
  'sunday' => 'Sonntag',
);