Você pode usar IF e CONCAT para verificar datas incompletas e substituir 00 por 01.
IF ( isnull(CONCAT(v6.title,v7.title,v8.title)), IF ( isnull(CONCAT(v7.title,v8.title)), v8.title,
CONCAT(v7.title,\'.\',v8.title) ),
CONCAT(v6.title,\'.\',v7.title,\'.\',v8.title) ) AS "Datum",
IF ( isnull(CONCAT(v9.title,v10.title)) & isnull(CONCAT(v11.title, v12.title)), v13.title,
IF ( isnull(CONCAT(v9.title,v10.title)) & isnull(v13.title), CONCAT(v11.title,\'-\', v12.title),
IF ( isnull(CONCAT(v11.title,v12.title)) & isnull(v13.title), CONCAT(v9.title,\':\', v10.title, \' Uhr\'),
"Hello World" ) ) ) AS "Uhrzeit",
