diff --git a/src/World.cpp b/src/World.cpp
index 1866d4eaf..599bd1d6f 100644
--- a/src/World.cpp
+++ b/src/World.cpp
@@ -471,6 +471,8 @@ void cWorld::Start(cDeadlockDetect & a_DeadlockDetect)
 	int GameMode                  = IniFile.GetValueSetI("General",       "Gamemode",                    static_cast<int>(m_GameMode));
 	int Weather                   = IniFile.GetValueSetI("General",       "Weather",                     static_cast<int>(m_Weather));
 
+	m_WorldAge = std::chrono::milliseconds(IniFile.GetValueSetI("General", "WorldAgeMS", 0LL));
+
 	// Load the weather frequency data:
 	if (m_Dimension == dimOverworld)
 	{
@@ -937,6 +939,7 @@ void cWorld::Stop(cDeadlockDetect & a_DeadlockDetect)
 		IniFile.SetValueB("General", "IsDaylightCycleEnabled", m_IsDaylightCycleEnabled);
 		IniFile.SetValueI("General", "Weather", static_cast<int>(m_Weather));
 		IniFile.SetValueI("General", "TimeInTicks", GetTimeOfDay());
+		IniFile.SetValueI("General", "WorldAgeMS", static_cast<Int64>(m_WorldAge.count()));
 	IniFile.WriteFile(m_IniFileName);
 
 	m_TickThread.Stop();
diff --git a/src/World.h b/src/World.h
index 591b61911..5957f5432 100644
--- a/src/World.h
+++ b/src/World.h
@@ -897,8 +897,11 @@ private:
 	bool m_BroadcastAchievementMessages;
 
 	bool   m_IsDaylightCycleEnabled;
-	// std::chrono::milliseconds is guaranteed to be good for 292 years by the standard.
-	std::chrono::milliseconds  m_WorldAge;
+
+	/** The age of the world.
+	Monotonic, always increasing each game tick, persistent across server restart. */
+	std::chrono::milliseconds m_WorldAge;
+
 	std::chrono::milliseconds  m_TimeOfDay;
 	cTickTimeLong  m_LastTimeUpdate;    // The tick in which the last time update has been sent.
 	cTickTimeLong  m_LastChunkCheck;        // The last WorldAge (in ticks) in which unloading and possibly saving was triggered