diff --git a/src/tt/tui/modals.py b/src/tt/tui/modals.py
index 89805ee..cfcc127 100644
--- a/src/tt/tui/modals.py
+++ b/src/tt/tui/modals.py
@@ -256,7 +256,7 @@ class DateModal(ModalScreen):
             event.prevent_default()
 
     def action_select(self):
-        self.dismiss("-".join(str(p) for p in self.pieces))
+        self.dismiss("-".join(f"{p:02d}" for p in self.pieces))
 
     def action_cancel(self):
         self.app.pop_screen()