diff --git a/gestion/mail/mail.py b/gestion/mail/mail.py
index 7f6c07d9..8e8b9fb1 100644
--- a/gestion/mail/mail.py
+++ b/gestion/mail/mail.py
@@ -35,10 +35,11 @@ templateLoader = jinja2.FileSystemLoader( searchpath=["/", template_path]  )
 templateEnv = jinja2.Environment( loader=templateLoader )
 
 def format_date(d):
+    # Beware: l'encodage utilisé ici dépend de la locale choisie plus bas
     if 'fr_FR' in locale.getlocale():
-        return d.strftime('%A %d %B %Y')
+        return d.strftime('%A %d %B %Y').decode('utf-8')
     else:
-        return d.strftime('%A, %B %d %Y')
+        return d.strftime('%A, %B %d %Y').decode('utf-8')
 
 def given_name(adh):
     if 'club' in adh['objectClass']: