diff --git a/python/leap/leap.py b/python/leap/leap.py
index 50fd034..94fdd7a 100644
--- a/python/leap/leap.py
+++ b/python/leap/leap.py
@@ -1,2 +1,9 @@
 def leap_year(year):
-    pass
+    hundred_special = year % 100 == 0
+
+    if year % 4 == 0 and not hundred_special:
+        return True
+    if year % 4 == 0 and hundred_special and year % 400 == 0:
+        return True
+
+    return False