diff --git a/public/js/components/Calendar/Day.js b/public/js/components/Calendar/Day.js
index af6a3d44d..afee386a6 100644
--- a/public/js/components/Calendar/Day.js
+++ b/public/js/components/Calendar/Day.js
@@ -13,7 +13,7 @@ export default {
 	},
 	computed: {
 		title() {
-			return this.focusDate.format({ year: 'numeric' }) + ' KW ' + this.focusDate.w;
+			return this.focusDate.wYear + ' KW ' + this.focusDate.w;
 		}
 	},
 	methods: {
diff --git a/public/js/components/Calendar/Week.js b/public/js/components/Calendar/Week.js
index 9de82ba79..f17a09511 100644
--- a/public/js/components/Calendar/Week.js
+++ b/public/js/components/Calendar/Week.js
@@ -12,7 +12,7 @@ export default {
 	},
 	computed: {
 		title() {
-			return this.focusDate.format({year: 'numeric'}) + ' KW ' + this.focusDate.w;
+			return this.focusDate.wYear + ' KW ' + this.focusDate.w;
 		}
 	},
 	methods: {
diff --git a/public/js/composables/CalendarDate.js b/public/js/composables/CalendarDate.js
index 19d53fe5e..d71b22963 100644
--- a/public/js/composables/CalendarDate.js
+++ b/public/js/composables/CalendarDate.js
@@ -49,6 +49,12 @@ class CalendarDate {
 			}
 		}
 	}
+	get wYear() {
+		if( this.w === 1 ) {
+			return this.cdLastDayOfWeek.format({ year: 'numeric' });
+		}
+		return this.cdFirstDayOfWeek.format({ year: 'numeric' });
+	}
 	get wd() {
 		if (this._wd === null) {
 			this._wd = ((new Date(this.y, this.m, this.d)).getDay()+7-this.weekStart)%7;