diff --git a/index.php b/index.php
index d721329cb08fba3003f45eef28ef768da0f50d22..4573d8d9868f489c6e410e4b02854700dbe1536e 100644
--- a/index.php
+++ b/index.php
@@ -82,5 +82,17 @@
             print $e->getMessage();
         }
     ?>
+
+    <h1>Function 6</h1>
+    <?php
+        print "<h2>Пятницы 13: </h2>";
+        try {
+            foreach ($func->countFriday13(2024) as $date) {
+                print $date->format("Y-m-d l") . "\n";
+            }
+        } catch (Exception $e) {
+            print $e->getMessage();
+        }
+    ?>
 </body>
 </html>
\ No newline at end of file
diff --git a/src/Functions.php b/src/Functions.php
index e3c266eacc18b0ef2e0d01c5747e31d6f3734e19..f7b52aa43644e535ee393f3fc3973a396378c55e 100644
--- a/src/Functions.php
+++ b/src/Functions.php
@@ -151,5 +151,23 @@ class Functions
         $dateInterval = date_diff(new DateTimeImmutable($endYear), $date);
         return (int)$dateInterval->format("%a") + 1;
     }
+
+    /**
+     * Вернет все пятницы 13 в году
+     * @param int $year год, в котором необходимо произвести расчет
+     * @return DateTimeImmutable[]
+     * @throws Exception
+     */
+
+    public function countFriday13(int $year): iterable
+    {
+        $startDate = new DateTime("$year-01-01 Friday");
+        ++$year;
+        $endDate = new DateTime("$year-01-01");
+        $interval = new DateInterval('P7D');
+        foreach (new DatePeriod($startDate, $interval, $endDate) as $day) {
+            yield new DateTimeImmutable($day->format("Y-m-d"));
+        }
+    }
 }