diff --git a/src/PhpSpreadsheet/Shared/Date.php b/src/PhpSpreadsheet/Shared/Date.php
index 9dc99292..cb37515d 100644
--- a/src/PhpSpreadsheet/Shared/Date.php
+++ b/src/PhpSpreadsheet/Shared/Date.php
@@ -387,6 +387,11 @@ class Date
         if ((substr($pFormatCode, 0, 1) == '_') || (substr($pFormatCode, 0, 2) == '0 ')) {
             return false;
         }
+        // Some "special formats" provided in German Excel versions were detected as date time value,
+        // so filter them out here - "\C\H\-00000" (Switzerland) and "\D-00000" (Germany).
+        if (\strpos($pFormatCode, '-00000') !== false) {
+            return false;
+        }
         // Try checking for any of the date formatting characters that don't appear within square braces
         if (preg_match('/(^|\])[^\[]*[' . self::$possibleDateFormatCharacters . ']/i', $pFormatCode)) {
             //    We might also have a format mask containing quoted strings...
diff --git a/tests/data/Shared/Date/FormatCodes.php b/tests/data/Shared/Date/FormatCodes.php
index 64810de3..b558874c 100644
--- a/tests/data/Shared/Date/FormatCodes.php
+++ b/tests/data/Shared/Date/FormatCodes.php
@@ -150,4 +150,12 @@ return [
         true,
         '"date " y-m-d',
     ],
+    [
+        false,
+        '\C\H\-00000',
+    ],
+    [
+        false,
+        '\D-00000',
+    ],
 ];