diff --git a/public/js/components/Cis/Renderer/Lehreinheit/calendarEvent.js b/public/js/components/Cis/Renderer/Lehreinheit/calendarEvent.js
index b5f9ae617..499a071a8 100644
--- a/public/js/components/Cis/Renderer/Lehreinheit/calendarEvent.js
+++ b/public/js/components/Cis/Renderer/Lehreinheit/calendarEvent.js
@@ -9,19 +9,41 @@ export default {
 
 		},
 	},
+	computed:{
+		calendarEventTooltip: function(){
+			let lektorenEmpty = true;
+			let tooltipString = `${this.$p.t('global','uhrzeit')}: ${this.convertTime(this.event.beginn.split(":"))} / ${this.convertTime(this.event.ende.split(":")) }`;
+			
+			tooltipString += `\n${this.$p.t('profilUpdate', 'topic')}: ${this.event.topic}`;
+			
+			if(Array.isArray(this.event.lektor) && this.event.lektor.length > 0){
+				lektorenEmpty = false;
+				tooltipString += `\n${this.$p.t('lehre','lektor')}: `;
+				this.event.lektor.forEach(lektor => {
+					tooltipString += `${lektor.kurzbz}\n`;
+				})
+			}
+			if(lektorenEmpty){
+				tooltipString += "\n";	
+			}
+			tooltipString += `${this.$p.t('person','ort')}: ${this.event.ort_kurzbz}`;
+			
+			return tooltipString;
+		},
+	},
 	props:{
 		event: {
 			type:Object,
 			required:true,
 		},
 	},
-	template: `
+	template: /*html*/`
 	<div class="lehreinheitEventContent h-100 w-100 p-1" >
 		<div id="lehreinheitEventHeader" class="h-100 " v-if="!event.allDayEvent && event?.beginn && event?.ende" >
 			<span class="small">{{convertTime(event.beginn.split(":"))}}</span>
 			<span class="small">{{convertTime(event.ende.split(":"))}}</span>
 		</div>
-		<div id="lehreinheitEventText">
+		<div id="lehreinheitEventText" v-tooltip="calendarEventTooltip">
 			<span id="lehreinheitTopic">{{event.topic}}</span>
 			<span id="lehreinheitLektoren" v-for="lektor in event.lektor">{{lektor.kurzbz}}</span>
 			<span id="lehreinheitOrt">{{event.ort_kurzbz}}</span>