diff --git a/projet_conso.py b/projet_conso.py
index e548e04..6f32817 100644
--- a/projet_conso.py
+++ b/projet_conso.py
@@ -31,4 +31,8 @@ def numerojour(date) :
     
     
 def estbissextile(annee) :
-    if annee == 
\ No newline at end of file
+    for annee in nom : 
+        if annee % 4 == 0 and annee % 100 != 0 and annee % 400 == 0  : 
+            True
+    return False 
+             
\ No newline at end of file