diff --git a/src/order_cmd.cpp b/src/order_cmd.cpp
index 62411745e3..f7f42af6f4 100644
--- a/src/order_cmd.cpp
+++ b/src/order_cmd.cpp
@@ -2224,7 +2224,10 @@ CommandCost CmdModifyOrder(TileIndex tile, DoCommandFlag flags, uint32 p1, uint3
 						break;
 
 					case OCV_TIME_DATE:
-						if (!old_var_was_time) order->GetXDataRef() = 0;
+						if (!old_var_was_time) {
+							order->SetConditionValue(0);
+							order->GetXDataRef() = 0;
+						}
 						if (occ == OCC_IS_TRUE || occ == OCC_IS_FALSE) order->SetConditionComparator(OCC_EQUALS);
 						break;