diff --git a/qubes-rpc/qubes.Backup b/qubes-rpc/qubes.Backup
index 78c2e3e..cb194d0 100644
--- a/qubes-rpc/qubes.Backup
+++ b/qubes-rpc/qubes.Backup
@@ -3,7 +3,7 @@ read args
 echo Arguments: $args 
 if [ -d "$args" ] ; then
   echo "Performing backup to directory $args"
-  TARGET="$args/qubes-backup-`date +'%Y-%d-%mT%H%M%S'`"
+  TARGET="$args/qubes-backup-`date +'%Y-%m-%dT%H%M%S'`"
   echo "Copying STDIN data to $TARGET"
   cat > $TARGET
 else