diff --git a/src/timetable_gui.cpp b/src/timetable_gui.cpp
--- a/src/timetable_gui.cpp
+++ b/src/timetable_gui.cpp
@@ -572,7 +572,7 @@ struct TimetableWindow : Window {
 			}
 
 			case WID_VT_START_DATE: // Change the date that the timetable starts.
-				ShowSetDateWindow(this, v->index, _date, _cur_year, _cur_year + MAX_TIMETABLE_START_YEARS, ChangeTimetableStartCallback, reinterpret_cast<void *>(static_cast<uintptr_t>(v->orders->IsCompleteTimetable() && _ctrl_pressed)));
+				ShowSetDateWindow(this, v->index, _date, _cur_year, _cur_year + MAX_TIMETABLE_START_YEARS, ChangeTimetableStartCallback, reinterpret_cast<void *>(static_cast<uintptr_t>(_ctrl_pressed)));
 				break;
 
 			case WID_VT_CHANGE_TIME: { // "Wait For" button.