diff --git a/frontend/src/components/reminders/ReminderList.tsx b/frontend/src/components/reminders/ReminderList.tsx
index b20cd74..9583f2b 100644
--- a/frontend/src/components/reminders/ReminderList.tsx
+++ b/frontend/src/components/reminders/ReminderList.tsx
@@ -57,7 +57,7 @@ export default function ReminderList({ reminders, onEdit }: ReminderListProps) {
   return (
     <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
       {reminders.map((reminder) => {
-        const isOverdue = !reminder.is_dismissed && isPast(new Date(reminder.remind_at));
+        const isOverdue = !reminder.is_dismissed && !!reminder.remind_at && isPast(new Date(reminder.remind_at));
         return (
           <Card
             key={reminder.id}
@@ -85,7 +85,7 @@ export default function ReminderList({ reminders, onEdit }: ReminderListProps) {
               )}
               <div className="flex items-center gap-2 text-sm text-muted-foreground mb-3">
                 <Calendar className="h-4 w-4" />
-                {format(new Date(reminder.remind_at), 'MMM d, yyyy h:mm a')}
+                {reminder.remind_at ? format(new Date(reminder.remind_at), 'MMM d, yyyy h:mm a') : 'No date set'}
                 {isOverdue && <span className="text-destructive font-medium">(Overdue)</span>}
               </div>
               <div className="flex gap-2" onClick={(e) => e.stopPropagation()}>
diff --git a/frontend/src/components/todos/TodoItem.tsx b/frontend/src/components/todos/TodoItem.tsx
index c1751e0..ad87c81 100644
--- a/frontend/src/components/todos/TodoItem.tsx
+++ b/frontend/src/components/todos/TodoItem.tsx
@@ -14,7 +14,8 @@ interface TodoItemProps {
   onEdit: (todo: Todo) => void;
 }
 
-const priorityColors = {
+const priorityColors: Record<string, string> = {
+  none: 'bg-gray-500/10 text-gray-400 border-gray-500/20',
   low: 'bg-green-500/10 text-green-500 border-green-500/20',
   medium: 'bg-yellow-500/10 text-yellow-500 border-yellow-500/20',
   high: 'bg-red-500/10 text-red-500 border-red-500/20',