diff --git a/src/qml/components/Calendar.qml b/src/qml/components/Calendar.qml
index 0525377..09dae8b 100644
--- a/src/qml/components/Calendar.qml
+++ b/src/qml/components/Calendar.qml
@@ -15,8 +15,13 @@ ColumnLayout {
 	QtObject {
 		id: internal
 		property date weekStartDate: {
+			const firstDayOfTheWeek = 1 // 1 = Monday, hardcoded for now
 			const date = new Date()
-			date.setDate(date.getDate() - date.getDay() + 1)
+			let	firstDayOfTheWeekDelta = date.getDay() - firstDayOfTheWeek
+			if (firstDayOfTheWeekDelta < 0) {
+				firstDayOfTheWeekDelta += 7
+			}
+			date.setDate(date.getDate() - firstDayOfTheWeekDelta)
 			return date
 		}
 	}