diff --git a/m/last_friday_datetime.py b/m/last_friday_datetime.py
new file mode 100644
index 0000000..f77b141
--- /dev/null
+++ b/m/last_friday_datetime.py
@@ -0,0 +1,13 @@
+from datetime import datetime, timedelta
+
+
+def get_last_friday(a: str) -> str:
+    date = datetime.strptime(a, "%m/%Y")
+    next_month = date.replace(month=date.month % 12 + 1, day=1)
+
+    last_day = next_month - timedelta(days=1)
+
+    while last_day.weekday() != 4:
+        last_day -= timedelta(days=1)
+
+    return last_day.strftime("%d.%m.%Y")
\ No newline at end of file