From cc28e19052b0bad643bbc54e832dcdb9f6f898fd Mon Sep 17 00:00:00 2001
From: Peter Nelson <peter1138@openttd.org>
Date: Sun, 11 Jan 2026 00:03:56 +0000
Subject: [PATCH] Fix #15079: Incorrect dates shown on town cargo history
 graph. (#15080)

---
 src/graph_gui.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/graph_gui.cpp b/src/graph_gui.cpp
index 95dec25d06..543f7a2055 100644
--- a/src/graph_gui.cpp
+++ b/src/graph_gui.cpp
@@ -1866,7 +1866,6 @@ struct TownCargoGraphWindow : BaseCargoGraphWindow {
 		this->num_on_x_axis = GRAPH_NUM_MONTHS;
 		this->num_vert_lines = GRAPH_NUM_MONTHS;
 		this->month_increment = 1;
-		this->x_values_reversed = true;
 		this->x_values_increment = ECONOMY_MONTH_MINUTES;
 		this->draw_dates = !TimerGameEconomy::UsingWallclockUnits();
 		this->ranges = RANGE_LABELS;
@@ -1905,7 +1904,7 @@ struct TownCargoGraphWindow : BaseCargoGraphWindow {
 
 	void UpdateStatistics(bool initialize) override
 	{
-		int mo = TimerGameEconomy::month - this->num_vert_lines;
+		int mo = (TimerGameEconomy::month / this->month_increment - this->num_vert_lines) * this->month_increment;
 		auto yr = TimerGameEconomy::year;
 		while (mo < 0) {
 			yr--;