diff --git a/src/linkgraph/linkgraphschedule.cpp b/src/linkgraph/linkgraphschedule.cpp
--- a/src/linkgraph/linkgraphschedule.cpp
+++ b/src/linkgraph/linkgraphschedule.cpp
@@ -132,7 +132,7 @@ void LinkGraphSchedule::SpawnAll()
  * graph jobs by the number of days given.
  * @param interval Number of days to be added or subtracted.
  */
-void LinkGraphSchedule::ShiftDates(TimerGameCalendar::Date interval)
+void LinkGraphSchedule::ShiftDates(TimerGameEconomy::Date interval)
 {
 	for (LinkGraph *lg : LinkGraph::Iterate()) lg->ShiftDates(interval);
 	for (LinkGraphJob *lgj : LinkGraphJob::Iterate()) lgj->ShiftJoinDate(interval);
@@ -163,10 +163,10 @@ LinkGraphSchedule::~LinkGraphSchedule()
 }
 
 /**
- * Pause the game if in 2 TimerGameCalendar::date_fract ticks, we would do a join with the next
+ * Pause the game if in 2 TimerGameEconomy::date_fract ticks, we would do a join with the next
  * link graph job, but it is still running.
- * The check is done 2 TimerGameCalendar::date_fract ticks early instead of 1, as in multiplayer
- * calls to DoCommandP are executed after a delay of 1 TimerGameCalendar::date_fract tick.
+ * The check is done 2 TimerGameEconomy::date_fract ticks early instead of 1, as in multiplayer
+ * calls to DoCommandP are executed after a delay of 1 TimerGameEconomy::date_fract tick.
  * If we previously paused, unpause if the job is now ready to be joined with.
  */
 void StateGameLoop_LinkGraphPauseControl()
@@ -177,10 +177,10 @@ void StateGameLoop_LinkGraphPauseControl
 			Command<CMD_PAUSE>::Post(PM_PAUSED_LINK_GRAPH, false);
 		}
 	} else if (_pause_mode == PM_UNPAUSED &&
-			TimerGameCalendar::date_fract == LinkGraphSchedule::SPAWN_JOIN_TICK - 2 &&
-			TimerGameCalendar::date.base() % (_settings_game.linkgraph.recalc_interval / CalendarTime::SECONDS_PER_DAY) == (_settings_game.linkgraph.recalc_interval / CalendarTime::SECONDS_PER_DAY) / 2 &&
+			TimerGameEconomy::date_fract == LinkGraphSchedule::SPAWN_JOIN_TICK - 2 &&
+			TimerGameEconomy::date.base() % (_settings_game.linkgraph.recalc_interval / EconomyTime::SECONDS_PER_DAY) == (_settings_game.linkgraph.recalc_interval / EconomyTime::SECONDS_PER_DAY) / 2 &&
 			LinkGraphSchedule::instance.IsJoinWithUnfinishedJobDue()) {
-		/* Perform check two TimerGameCalendar::date_fract ticks before we would join, to make
+		/* Perform check two TimerGameEconomy::date_fract ticks before we would join, to make
 		 * sure it also works in multiplayer. */
 		Command<CMD_PAUSE>::Post(PM_PAUSED_LINK_GRAPH, true);
 	}
@@ -204,11 +204,11 @@ void AfterLoad_LinkGraphPauseControl()
  */
 void OnTick_LinkGraph()
 {
-	if (TimerGameCalendar::date_fract != LinkGraphSchedule::SPAWN_JOIN_TICK) return;
-	TimerGameCalendar::Date offset = TimerGameCalendar::date.base() % (_settings_game.linkgraph.recalc_interval / CalendarTime::SECONDS_PER_DAY);
+	if (TimerGameEconomy::date_fract != LinkGraphSchedule::SPAWN_JOIN_TICK) return;
+	TimerGameEconomy::Date offset = TimerGameEconomy::date.base() % (_settings_game.linkgraph.recalc_interval / EconomyTime::SECONDS_PER_DAY);
 	if (offset == 0) {
 		LinkGraphSchedule::instance.SpawnNext();
-	} else if (offset == (_settings_game.linkgraph.recalc_interval / CalendarTime::SECONDS_PER_DAY) / 2) {
+	} else if (offset == (_settings_game.linkgraph.recalc_interval / EconomyTime::SECONDS_PER_DAY) / 2) {
 		if (!_networking || _network_server) {
 			PerformanceMeasurer::SetInactive(PFE_GL_LINKGRAPH);
 			LinkGraphSchedule::instance.JoinNext();