diff --git a/src/utils/calculateWeekNum.ts b/src/utils/calculateWeekNum.ts
index b7ebbc7..35e5428 100644
--- a/src/utils/calculateWeekNum.ts
+++ b/src/utils/calculateWeekNum.ts
@@ -2,12 +2,13 @@ export default (date: Date): { weekYear: number, weekNum: number } => {
 	const tempDate = new Date(date)
 	tempDate.setHours(0, 0, 0, 0)
 
-	tempDate.setDate(tempDate.getDate() + 3 - (tempDate.getDay() || 7))
+	tempDate.setDate(tempDate.getDate() + 4 - (tempDate.getDay() || 7))
 
-	const firstFriday = new Date(tempDate.getFullYear(), 0, 5) // Changed to 5 for Friday
-	firstFriday.setDate(firstFriday.getDate() + 3 - (firstFriday.getDay() || 7))
+	const forthDay = new Date(tempDate.getFullYear(), 0, 4)
+	console.log(forthDay)
+	forthDay.setDate(forthDay.getDate() + 4 - (forthDay.getDay() || 7))
 
-	const diffInDays = Math.floor((tempDate.getTime() - firstFriday.getTime()) / (24 * 60 * 60 * 1000))
+	const diffInDays = Math.floor((tempDate.getTime() - forthDay.getTime()) / (24 * 60 * 60 * 1000))
 
 	const weekNum = Math.ceil((diffInDays + 1) / 7)