diff --git a/src/main/java/seedu/waddle/logic/commands/AddCommand.java b/src/main/java/seedu/waddle/logic/commands/AddCommand.java
index 71b307666c8..3f03420fab6 100644
--- a/src/main/java/seedu/waddle/logic/commands/AddCommand.java
+++ b/src/main/java/seedu/waddle/logic/commands/AddCommand.java
@@ -57,6 +57,7 @@ public CommandResult execute(Model model) throws CommandException {
         }
 
         model.addItinerary(toAdd);
+        System.out.println("number of days in a newly created itinerary with duration: " + this.toAdd.getDays().size());
         return new CommandResult(String.format(MESSAGE_SUCCESS, toAdd));
     }
 
diff --git a/src/main/java/seedu/waddle/logic/commands/EditCommand.java b/src/main/java/seedu/waddle/logic/commands/EditCommand.java
index f7b25357b13..b0c0be52899 100644
--- a/src/main/java/seedu/waddle/logic/commands/EditCommand.java
+++ b/src/main/java/seedu/waddle/logic/commands/EditCommand.java
@@ -78,6 +78,7 @@ private static Itinerary createEditedItinerary(Itinerary itineraryToEdit,
         Date updatedStartDate = editItineraryDescriptor.getStartDate().orElse(itineraryToEdit.getStartDate());
         ItineraryDuration updatedDuration = editItineraryDescriptor.getDuration()
                 .orElse(itineraryToEdit.getDuration());
+        System.out.println("the updated duration is: " + updatedDuration);
         People updatedPeople = editItineraryDescriptor.getPeople().orElse(itineraryToEdit.getPeople());
         Budget updatedBudget = editItineraryDescriptor.getBudget().orElse(itineraryToEdit.getBudget());
 
diff --git a/src/main/java/seedu/waddle/model/item/Duration.java b/src/main/java/seedu/waddle/model/item/Duration.java
index 2ae8f9679cd..fe25b72da06 100644
--- a/src/main/java/seedu/waddle/model/item/Duration.java
+++ b/src/main/java/seedu/waddle/model/item/Duration.java
@@ -8,7 +8,6 @@
 public class Duration {
     public static final String MESSAGE_CONSTRAINTS = "Duration should only contain a positive number.";
     private final int duration;
-    private final boolean isNull;
 
     /**
      * Constructs a {@code Duration}.
@@ -16,14 +15,8 @@ public class Duration {
      * @param duration A valid duration.
      */
     public Duration(String duration) {
-        if (duration == null) {
-            this.isNull = true;
-            this.duration = 0;
-        } else {
-            checkArgument(isValidDuration(duration), MESSAGE_CONSTRAINTS);
-            this.duration = Integer.valueOf(duration);
-            this.isNull = false;
-        }
+        checkArgument(isValidDuration(duration), MESSAGE_CONSTRAINTS);
+        this.duration = Integer.valueOf(duration);
     }
 
     public int getDuration() {
@@ -45,10 +38,6 @@ public static boolean isValidDuration(String test) {
         }
         return value >= 0;
     }
-
-    public boolean isNull() {
-        return isNull;
-    }
     @Override
     public String toString() {
         return String.valueOf(duration);
diff --git a/src/main/java/seedu/waddle/model/itinerary/Itinerary.java b/src/main/java/seedu/waddle/model/itinerary/Itinerary.java
index 795d751560a..252405aec68 100644
--- a/src/main/java/seedu/waddle/model/itinerary/Itinerary.java
+++ b/src/main/java/seedu/waddle/model/itinerary/Itinerary.java
@@ -66,12 +66,6 @@ public Country getCountry() {
         return country;
     }
 
-    /* TODO: implement method
-    public Date getEndDate() {
-        return duration.getEndFromStart(startDate);
-    }
-     */
-
     public Date getStartDate() {
         return startDate;
     }
@@ -263,10 +257,14 @@ public String toString() {
         return builder.toString();
     }
 
-    public void setDays(List<Day> days) {
-        for (int i = 0; i < getDuration().getValue(); i++) {
-            if (i < days.size()) {
-                this.days.add(i, days.get(i));
+    public void setDays(List<Day> dayList) {
+        for (int i = 0; i < dayList.size(); i++) {
+            if (i < getDuration().getValue()) {
+                this.days.set(i, dayList.get(i));;
+            } else {
+                for (Item item : dayList.get(i).deleteDay()) {
+                    addItem(item);
+                }
             }
         }
     }