diff --git a/src/date_type.h b/src/date_type.h
--- a/src/date_type.h
+++ b/src/date_type.h
@@ -25,19 +25,26 @@ typedef uint8  Day;   ///< Type for the 
  * 1 tick is approximately 30 ms.
  * 1 day is thus about 2 seconds (74 * 30 = 2220) on a machine that can run OpenTTD normally
  */
-static const int DAY_TICKS         =  74; ///< ticks per day
+static const int ORIG_DAY_TICKS    =  74; ///< unscaled ticks per day
 static const int DAYS_IN_YEAR      = 365; ///< days per year
 static const int DAYS_IN_LEAP_YEAR = 366; ///< sometimes, you need one day more...
 static const int MONTHS_IN_YEAR    =  12; ///< months per year
 
+/**
+ * Day length in ticks, calculated using a configurable scale factor.
+ */
+#define DAY_TICKS (ORIG_DAY_TICKS * _settings_game.economy.daylength_multiplier)
+
 static const int STATION_RATING_TICKS     = 185; ///< cycle duration for updating station rating
 static const int STATION_ACCEPTANCE_TICKS = 250; ///< cycle duration for updating station acceptance
 static const int STATION_LINKGRAPH_TICKS  = 504; ///< cycle duration for cleaning dead links
 static const int CARGO_AGING_TICKS        = 185; ///< cycle duration for aging cargo
 static const int INDUSTRY_PRODUCE_TICKS   = 256; ///< cycle duration for industry production
-static const int TOWN_GROWTH_TICKS        = 70;  ///< cycle duration for towns trying to grow. (this originates from the size of the town array in TTD
+static const int ORIG_TOWN_GROWTH_TICKS   = 70;  ///< cycle duration for towns trying to grow. (this originates from the size of the town array in TTD)
 static const int INDUSTRY_CUT_TREE_TICKS  = INDUSTRY_PRODUCE_TICKS * 2; ///< cycle duration for lumber mill's extra action
 
+#define TOWN_GROWTH_TICKS (ORIG_TOWN_GROWTH_TICKS * _settings_game.economy.town_growth_multiplier)
+
 
 /*
  * ORIGINAL_BASE_YEAR, ORIGINAL_MAX_YEAR and DAYS_TILL_ORIGINAL_BASE_YEAR are
@@ -111,4 +118,7 @@ static const Year  INVALID_YEAR  = -1; /
 static const Date  INVALID_DATE  = -1; ///< Representation of an invalid date
 static const Ticks INVALID_TICKS = -1; ///< Representation of an invalid number of ticks
 
+// daylength patch requirement
+#include "settings_type.h"
+
 #endif /* DATE_TYPE_H */