diff --git a/app/index.php b/app/index.php
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..0f1ea93ac009cd97c70b901895836b34f29f9914 100644
--- a/app/index.php
+++ b/app/index.php
@@ -0,0 +1,5 @@
+<?php
+require_once ('repository/CountFriday13.php');
+
+$year = 2024;
+var_dump(countFriday13($year));
\ No newline at end of file
diff --git a/app/repository/CountFriday13.php b/app/repository/CountFriday13.php
new file mode 100644
index 0000000000000000000000000000000000000000..8b7480f5e2e444a469b6d351770eae0e74cd949d
--- /dev/null
+++ b/app/repository/CountFriday13.php
@@ -0,0 +1,20 @@
+<?php
+
+/**
+ * Вернет все пятницы 13 в году
+ * @param int $yaer год, в котором необходимо произвести расчет
+ * @return DateTimeImmutable[]
+ */
+function countFriday13(int $year): iterable {
+    $date = new DateTimeImmutable();
+    $AllFri13 = [];
+
+    for ($i = 1; $i<=12; $i++ ){
+        $next13 = $date->setDate($year, $i, 13);
+
+        if ($next13->format("D") == 'Fri'){
+            $AllFri13[] = $next13;
+        }
+    }
+    return $AllFri13;
+}