diff --git a/frontend/src/components/CreateChoreModal.tsx b/frontend/src/components/CreateChoreModal.tsx
index bf9c0c9..9240bf9 100644
--- a/frontend/src/components/CreateChoreModal.tsx
+++ b/frontend/src/components/CreateChoreModal.tsx
@@ -40,7 +40,14 @@ const CreateChoreModal: React.FC<CreateChoreModalProps> = ({ onClose, onSuccess
     setIsLoading(true);
 
     try {
-      await choreService.createChore(formData);
+      // Convert date string to datetime if provided
+      const submitData = { ...formData };
+      if (submitData.due_date) {
+        // Convert YYYY-MM-DD to YYYY-MM-DDTHH:MM:SS format
+        submitData.due_date = `${submitData.due_date}T23:59:59`;
+      }
+      
+      await choreService.createChore(submitData);
       onSuccess();
     } catch (err: any) {
       // Handle different error response formats