diff --git a/tests/PhpSpreadsheetTests/Reader/Ods/Issue4476Test.php b/tests/PhpSpreadsheetTests/Reader/Ods/Issue4476Test.php
new file mode 100644
index 0000000000..7e3814a7a7
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Reader/Ods/Issue4476Test.php
@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Reader\Ods;
+
+use PhpOffice\PhpSpreadsheet\Reader\Ods;
+use PhpOffice\PhpSpreadsheet\Shared\Date;
+use PHPUnit\Framework\TestCase;
+
+class Issue4476Test extends TestCase
+{
+    public function testIssue2810(): void
+    {
+        // Active sheet with title of '0' wasn't found
+        $filename = 'tests/data/Reader/Ods/issue.4476.ods';
+        $reader = new Ods();
+        $spreadsheet = $reader->load($filename);
+        $sheet = $spreadsheet->getActiveSheet();
+        $rawValue = $sheet->getCell('A1')->getValue();
+        $dt = Date::excelToDateTimeObject($rawValue);
+        self::assertSame('2016-06-01 13:37', $dt->format('Y-m-d H:i'));
+        $spreadsheet->disconnectWorksheets();
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Reader/Xlsx/Issue4476Test.php b/tests/PhpSpreadsheetTests/Reader/Xlsx/Issue4476Test.php
new file mode 100644
index 0000000000..cc7b256f3f
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Reader/Xlsx/Issue4476Test.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Reader\Xlsx;
+
+use PhpOffice\PhpSpreadsheet\Reader\Xlsx;
+use PhpOffice\PhpSpreadsheet\Shared\Date;
+use PHPUnit\Framework\TestCase;
+
+class Issue4476Test extends TestCase
+{
+    public function testIssue4476(): void
+    {
+        $filename = 'tests/data/Reader/XLSX/issue.4476.xlsx';
+
+        $reader = new Xlsx();
+        $spreadsheet = $reader->load($filename);
+        $sheet = $spreadsheet->getActiveSheet();
+        $rawValue = $sheet->getCell('A1')->getValue();
+        $dt = Date::excelToDateTimeObject($rawValue);
+
+        self::assertSame('2016-06-01 13:37', $dt->format('Y-m-d H:i'));
+        $spreadsheet->disconnectWorksheets();
+    }
+}
diff --git a/tests/data/Reader/Ods/issue.4476.ods b/tests/data/Reader/Ods/issue.4476.ods
new file mode 100644
index 0000000000..a14fcdfa38
Binary files /dev/null and b/tests/data/Reader/Ods/issue.4476.ods differ
diff --git a/tests/data/Reader/XLSX/issue.4476.xlsx b/tests/data/Reader/XLSX/issue.4476.xlsx
new file mode 100644
index 0000000000..5b8399a390
Binary files /dev/null and b/tests/data/Reader/XLSX/issue.4476.xlsx differ