diff --git a/src/subsidy_gui.cpp b/src/subsidy_gui.cpp
--- a/src/subsidy_gui.cpp
+++ b/src/subsidy_gui.cpp
@@ -13,6 +13,7 @@
 #include "window_gui.h"
 #include "strings_func.h"
 #include "date_func.h"
+#include "timer/timer_game_calendar.h"
 #include "viewport_func.h"
 #include "gui.h"
 #include "subsidy_func.h"
@@ -143,7 +144,7 @@ struct SubsidyListWindow : Window {
 		if (widget != WID_SUL_PANEL) return;
 
 		YearMonthDay ymd;
-		ConvertDateToYMD(_date, &ymd);
+		ConvertDateToYMD(TimerGameCalendar::date, &ymd);
 
 		Rect tr = r.Shrink(WidgetDimensions::scaled.framerect);
 
@@ -160,7 +161,7 @@ struct SubsidyListWindow : Window {
 				if (IsInsideMM(pos, 0, cap)) {
 					/* Displays the two offered towns */
 					SetupSubsidyDecodeParam(s, SubsidyDecodeParamType::Gui);
-					SetDParam(7, _date - ymd.day + s->remaining * 32);
+					SetDParam(7, TimerGameCalendar::date - ymd.day + s->remaining * 32);
 					DrawString(tr.left, tr.right, tr.top + pos * FONT_HEIGHT_NORMAL, STR_SUBSIDIES_OFFERED_FROM_TO);
 				}
 				pos++;
@@ -184,7 +185,7 @@ struct SubsidyListWindow : Window {
 				if (IsInsideMM(pos, 0, cap)) {
 					SetupSubsidyDecodeParam(s, SubsidyDecodeParamType::Gui);
 					SetDParam(7, s->awarded);
-					SetDParam(8, _date - ymd.day + s->remaining * 32);
+					SetDParam(8, TimerGameCalendar::date - ymd.day + s->remaining * 32);
 
 					/* Displays the two connected stations */
 					DrawString(tr.left, tr.right, tr.top + pos * FONT_HEIGHT_NORMAL, STR_SUBSIDIES_SUBSIDISED_FROM_TO);