diff --git a/src/ship_cmd.cpp b/src/ship_cmd.cpp
--- a/src/ship_cmd.cpp
+++ b/src/ship_cmd.cpp
@@ -22,7 +22,7 @@
 #include "spritecache.h"
 #include "strings_func.h"
 #include "window_func.h"
-#include "date_func.h"
+#include "timer/timer_game_calendar.h"
 #include "vehicle_func.h"
 #include "sound_func.h"
 #include "ai/ai.hpp"
@@ -891,8 +891,8 @@ CommandCost CmdBuildShip(DoCommandFlag f
 		v->state = TRACK_BIT_DEPOT;
 
 		v->SetServiceInterval(Company::Get(_current_company)->settings.vehicle.servint_ships);
-		v->date_of_last_service = _date;
-		v->build_year = _cur_year;
+		v->date_of_last_service = TimerGameCalendar::date;
+		v->build_year = TimerGameCalendar::year;
 		v->sprite_cache.sprite_seq.Set(SPR_IMG_QUERY);
 		v->random_bits = VehicleRandomBits();