diff --git a/lib/Date/Language/French.pm b/lib/Date/Language/French.pm
index 91b414c..174f2cb 100644
--- a/lib/Date/Language/French.pm
+++ b/lib/Date/Language/French.pm
@@ -32,5 +32,6 @@ sub format_b { $MoYs[$_[0]->[4]] }
 sub format_B { $MoY[$_[0]->[4]] }
 sub format_h { $MoYs[$_[0]->[4]] }
 sub format_p { $_[0]->[2] >= 12 ?  $AMPM[1] : $AMPM[0] }
+sub format_o { sprintf("%2de",$_[0]->[3]) }
 
 1;