--- a/orders.py
+++ b/orders.py
@@ -8,5 +8,5 @@
     return [
         order for order in orders
         if order["status"] == "paid"
-        and start_day <= date.fromisoformat(order["date"]) < end_day
+        and start_day <= date.fromisoformat(order["date"]) <= end_day
     ]