diff --git a/client/index.js b/client/index.js
index 7540b13..7cc7d93 100644
--- a/client/index.js
+++ b/client/index.js
@@ -37,8 +37,6 @@ stage.element.addEventListener('focus', () => {
   isFocused = true;
 });
 stage.addToDom(appNode);
-// World time ticker.
-const worldTimeTicker = new Ticker(1 / 10);
 // Handle "own" entity.
 let selfEntity;
 function hasSelfEntity() {
@@ -51,9 +49,6 @@ const roomView = new RoomView(room, stage.renderer);
 stage.addChild(roomView);
 // Time.
 const worldTime = new WorldTime();
-worldTimeTicker.on('tick', () => {
-  worldTimeTicker.emit('updateTime', worldTime.hour)
-});
 // Synchronize state.
 let state = undefined;
 const synchronizer = new Synchronizer({
@@ -208,8 +203,6 @@ const predictionHandle = setInterval(() => {
   state = synchronizer.state;
   // Render timing.
   renderTicker.tick(elapsed);
-  // World time ticker.
-  worldTimeTicker.tick(elapsed);
   // Throughput ticker.
   throughputTicker.tick(elapsed);
   // Apply environmental lighting.
@@ -267,7 +260,7 @@ function render() {
 const renderHandle = setAnimation(render);
 // UI.
 const UiComponent = <Ui
-  worldTimeTicker={worldTimeTicker}
+  worldTime={worldTime}
   throughputTicker={throughputTicker}
 />;
 ReactDOM.render(UiComponent, stage.ui);
diff --git a/client/ui/index.js b/client/ui/index.js
index 2573978..a12ed43 100644
--- a/client/ui/index.js
+++ b/client/ui/index.js
@@ -5,9 +5,9 @@ import {hot} from 'react-hot-loader/root';
 import Throughput from './throughput';
 import WorldTime from './world-time';
 
-const Ui = ({throughputTicker, worldTimeTicker}) => {
+const Ui = ({throughputTicker, worldTime}) => {
   return <React.Fragment>
-    <WorldTime ticker={worldTimeTicker} />
+    <WorldTime worldTime={worldTime} />
     <Throughput ticker={throughputTicker} />
   </React.Fragment>;
 };
diff --git a/client/ui/world-time.js b/client/ui/world-time.js
index 8e8ef3c..d7b8136 100644
--- a/client/ui/world-time.js
+++ b/client/ui/world-time.js
@@ -23,15 +23,15 @@ const decorate = compose(
   `),
 );
 
-const WorldTimeComponent = ({ticker}) => {
+const WorldTimeComponent = ({worldTime}) => {
   const [time, setTime] = useState('--:-- --');
   useEffect(() => {
-    const updater = (hour) => {
-      setTime(WorldTime.format(hour));
+    const updater = () => {
+      setTime(WorldTime.format(worldTime.hour));
     };
-    ticker.on('updateTime', updater);
+    worldTime.ticker.on('tick', updater);
     return () => {
-      ticker.off('updateTime', updater);
+      worldTime.ticker.off('tick', updater);
     };
   }, []);
   return <div className="time unselectable">{time}</div>;