Warning: Attempt to read property "date" on null in /customers/b/b/0/cd0ib46rh/webroots/www/calendrier_ics.php on line 53

Fatal error: Uncaught TypeError: mktime(): Argument #4 ($month) must be of type ?int, string given in /customers/b/b/0/cd0ib46rh/webroots/www/calendrier_ics.php:56
Stack trace:
#0 /customers/b/b/0/cd0ib46rh/webroots/www/calendrier_ics.php(56): mktime(0, 0, 0, '', '', '')
#1 {main}
  thrown in /customers/b/b/0/cd0ib46rh/webroots/www/calendrier_ics.php on line 56