diff --git a/lab12.py b/lab12.py
new file mode 100644
index 0000000..1b6bc78
--- /dev/null
+++ b/lab12.py
@@ -0,0 +1,13 @@
+year = int(input("Enter a year: "))
+
+if year<1582:
+    print("Non rientra nel calendario gregoriano")
+elif year % 4 != 0:
+    print("Anno comune")
+elif year % 100 != 0:
+    print("Anno bisestile")
+elif year % 400 != 0:
+    print("Anno comune")
+else:
+    print("Anno bisestile")
+