diff --git a/backend/src/main/java/com/nttdata/calender/planTimes/PlanTimes.java b/backend/src/main/java/com/nttdata/calender/planTimes/PlanTimes.java
index ff7cdf9..e1e57fd 100644
--- a/backend/src/main/java/com/nttdata/calender/planTimes/PlanTimes.java
+++ b/backend/src/main/java/com/nttdata/calender/planTimes/PlanTimes.java
@@ -40,8 +40,9 @@ public class PlanTimes {
 
             int startWeek = startDate.get(IsoFields.WEEK_OF_WEEK_BASED_YEAR);
             int year = startDate.get(IsoFields.WEEK_BASED_YEAR);
+            String formattedStartWeek = String.format("%02d", startWeek);
 
-            calendarWeek.setWeek(year + "w" + startWeek);
+            calendarWeek.setWeek(year + "w" + formattedStartWeek);
             calendarWeek.setPlanTime(0);
             calendarWeek.setStartDate(startDate.format(formatter));