diff --git a/components/daily-quiz/daily-quiz-countdown.tsx b/components/daily-quiz/daily-quiz-countdown.tsx
new file mode 100644
index 0000000..a79c437
--- /dev/null
+++ b/components/daily-quiz/daily-quiz-countdown.tsx
@@ -0,0 +1,67 @@
+"use client";
+
+import { useEffect, useRef, useState } from "react";
+
+import {
+  formatDailyQuizCountdown,
+  getMillisecondsUntilNextDailyQuiz,
+  getNextDailyQuizAvailableAt,
+} from "@/lib/daily-quiz-storage";
+
+type DailyQuizCountdownProps = {
+  onAvailable?: () => void;
+};
+
+export function DailyQuizCountdown({ onAvailable }: DailyQuizCountdownProps) {
+  const [remainingMs, setRemainingMs] = useState(() =>
+    getMillisecondsUntilNextDailyQuiz(),
+  );
+  const hasNotifiedRef = useRef(false);
+
+  useEffect(() => {
+    const tick = () => {
+      const nextRemainingMs = getMillisecondsUntilNextDailyQuiz();
+      setRemainingMs(nextRemainingMs);
+
+      if (nextRemainingMs === 0) {
+        if (!hasNotifiedRef.current) {
+          hasNotifiedRef.current = true;
+          onAvailable?.();
+        }
+        return;
+      }
+
+      hasNotifiedRef.current = false;
+    };
+
+    tick();
+    const intervalId = window.setInterval(tick, 1000);
+
+    return () => {
+      window.clearInterval(intervalId);
+    };
+  }, [onAvailable]);
+
+  const nextAvailableAt = getNextDailyQuizAvailableAt();
+  const nextAvailableLabel = nextAvailableAt.toLocaleString(undefined, {
+    weekday: "short",
+    month: "short",
+    day: "numeric",
+    hour: "numeric",
+    minute: "2-digit",
+  });
+
+  return (
+    <div className="space-y-1 pt-1">
+      <p className="text-sm text-muted-foreground">
+        Next check-in available in{" "}
+        <span className="font-medium tabular-nums text-foreground">
+          {formatDailyQuizCountdown(remainingMs)}
+        </span>
+      </p>
+      <p className="text-xs text-muted-foreground">
+        Opens at midnight ({nextAvailableLabel})
+      </p>
+    </div>
+  );
+}
diff --git a/components/daily-quiz/daily-quiz-form.tsx b/components/daily-quiz/daily-quiz-form.tsx
index e75f1a2..315e13d 100644
--- a/components/daily-quiz/daily-quiz-form.tsx
+++ b/components/daily-quiz/daily-quiz-form.tsx
@@ -5,6 +5,7 @@ import Link from "next/link";
 import { useCallback, useEffect, useState } from "react";
 
 import { WellnessSlider } from "@/components/daily-quiz/wellness-slider";
+import { DailyQuizCountdown } from "@/components/daily-quiz/daily-quiz-countdown";
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
 import {
@@ -28,6 +29,7 @@ import {
   getCachedQuizTabData,
   prefetchQuizTabData,
 } from "@/lib/app-tab-data-cache";
+import { HABIT_PET_DATA_UPDATED_EVENT } from "@/lib/app-events";
 import { saveDailyEntry } from "@/lib/daily-quiz-storage";
 import { JOURNAL_MAX_LENGTH } from "@/lib/journal-safety";
 import { routes } from "@/lib/routes";
@@ -63,7 +65,7 @@ export function DailyQuizForm() {
 
     async function loadDailyCheckIn() {
       try {
-        const data = await prefetchQuizTabData();
+        const data = await prefetchQuizTabData({ force: true });
 
         if (cancelled) {
           return;
@@ -89,8 +91,15 @@ export function DailyQuizForm() {
 
     void loadDailyCheckIn();
 
+    const handleDataUpdated = () => {
+      void loadDailyCheckIn();
+    };
+
+    window.addEventListener(HABIT_PET_DATA_UPDATED_EVENT, handleDataUpdated);
+
     return () => {
       cancelled = true;
+      window.removeEventListener(HABIT_PET_DATA_UPDATED_EVENT, handleDataUpdated);
     };
   }, [applyQuizData]);
 
@@ -161,6 +170,11 @@ export function DailyQuizForm() {
                 </Link>{" "}
                 whenever you want to see how they are doing.
               </p>
+              <DailyQuizCountdown
+                onAvailable={() => {
+                  void prefetchQuizTabData({ force: true }).then(applyQuizData);
+                }}
+              />
             </div>
           </CardContent>
         </Card>
diff --git a/components/profile/profile-preferences-form.tsx b/components/profile/profile-preferences-form.tsx
index 4e175a1..656234e 100644
--- a/components/profile/profile-preferences-form.tsx
+++ b/components/profile/profile-preferences-form.tsx
@@ -25,6 +25,7 @@ import {
 } from "@/lib/daily-reminders";
 import { getDailyReminderStatus } from "@/lib/daily-reminder-status";
 import { getTodayDateKey } from "@/lib/habits-storage";
+import { resetTodaysDailyQuiz } from "@/lib/daily-quiz-storage";
 import {
   reminderDeliveryOptions,
   usesSystemReminders,
@@ -56,6 +57,8 @@ export function ProfilePreferencesForm({ email }: ProfilePreferencesFormProps) {
   const [notificationMessage, setNotificationMessage] = useState<string | null>(
     null,
   );
+  const [quizResetMessage, setQuizResetMessage] = useState<string | null>(null);
+  const [isResettingQuiz, setIsResettingQuiz] = useState(false);
 
   useEffect(() => {
     setNotificationPermission(getNotificationPermissionState());
@@ -209,6 +212,27 @@ export function ProfilePreferencesForm({ email }: ProfilePreferencesFormProps) {
     );
   };
 
+  const handleResetDailyQuiz = async () => {
+    setQuizResetMessage(null);
+    setError(null);
+    setIsResettingQuiz(true);
+
+    try {
+      await resetTodaysDailyQuiz();
+      setQuizResetMessage(
+        "Today's quiz was reset. Open the Quiz tab to take it again.",
+      );
+    } catch (resetError) {
+      setError(
+        resetError instanceof Error
+          ? resetError.message
+          : "Could not reset today's quiz.",
+      );
+    } finally {
+      setIsResettingQuiz(false);
+    }
+  };
+
   if (!isReady) {
     return (
       <p className="text-sm text-muted-foreground">Loading profile...</p>
@@ -365,6 +389,33 @@ export function ProfilePreferencesForm({ email }: ProfilePreferencesFormProps) {
         </CardContent>
       </Card>
 
+      <Card>
+        <CardHeader>
+          <CardTitle className="text-base">Demo tools</CardTitle>
+          <CardDescription>
+            Shortcuts for testing flows without waiting for the daily reset.
+          </CardDescription>
+        </CardHeader>
+        <CardContent className="space-y-4">
+          <p className="text-xs text-muted-foreground">
+            Reset clears today&apos;s wellness quiz entry so you can complete it
+            again immediately.
+          </p>
+          <Button
+            type="button"
+            variant="outline"
+            className="w-full"
+            disabled={isSaving || isResettingQuiz}
+            onClick={() => void handleResetDailyQuiz()}
+          >
+            {isResettingQuiz ? "Resetting..." : "Reset today's quiz"}
+          </Button>
+          {quizResetMessage ? (
+            <p className="text-xs text-emerald-600">{quizResetMessage}</p>
+          ) : null}
+        </CardContent>
+      </Card>
+
       <Card>
         <CardHeader>
           <CardTitle className="text-base">Account settings</CardTitle>
diff --git a/lib/daily-quiz-storage.ts b/lib/daily-quiz-storage.ts
index 417eb54..f4eac1c 100644
--- a/lib/daily-quiz-storage.ts
+++ b/lib/daily-quiz-storage.ts
@@ -5,6 +5,11 @@ import {
   type DailyQuizSubmission,
 } from "@/lib/avatar-state";
 import { notifyHabitPetDataUpdated } from "@/lib/app-events";
+import {
+  getMillisecondsUntilLocalMidnight,
+  getNextLocalMidnight,
+  getTodayDateKey,
+} from "@/lib/date-keys";
 import { computeAvatarConditionWithHabitBoosts } from "@/lib/habit-wellness-effects";
 import { getCompletedHabitLabelsForToday } from "@/lib/habits-storage";
 import { validateJournalEntry } from "@/lib/journal-safety";
@@ -20,8 +25,45 @@ type DailyEntryRow = {
   journal: string | null;
 };
 
-export function getTodayDateKey(date = new Date()) {
-  return date.toISOString().slice(0, 10);
+export { getTodayDateKey };
+
+export function getNextDailyQuizAvailableAt(from = new Date()) {
+  return getNextLocalMidnight(from);
+}
+
+export function getMillisecondsUntilNextDailyQuiz(from = new Date()) {
+  return getMillisecondsUntilLocalMidnight(from);
+}
+
+export function formatDailyQuizCountdown(milliseconds: number) {
+  const totalSeconds = Math.max(0, Math.floor(milliseconds / 1000));
+  const hours = Math.floor(totalSeconds / 3600);
+  const minutes = Math.floor((totalSeconds % 3600) / 60);
+  const seconds = totalSeconds % 60;
+
+  return `${hours}:${String(minutes).padStart(2, "0")}:${String(seconds).padStart(2, "0")}`;
+}
+
+export async function resetTodaysDailyQuiz() {
+  const userId = await getAuthenticatedUserId();
+
+  if (!userId) {
+    throw new Error("You must be signed in to reset today's quiz.");
+  }
+
+  const supabase = createClient();
+  const entryDate = getTodayDateKey();
+  const { error } = await supabase
+    .from("daily_entries")
+    .delete()
+    .eq("user_id", userId)
+    .eq("entry_date", entryDate);
+
+  if (error) {
+    throw new Error(error.message);
+  }
+
+  notifyHabitPetDataUpdated();
 }
 
 function mapRowToSubmission(
diff --git a/lib/date-keys.ts b/lib/date-keys.ts
new file mode 100644
index 0000000..5593d29
--- /dev/null
+++ b/lib/date-keys.ts
@@ -0,0 +1,19 @@
+export function getTodayDateKey(date = new Date()) {
+  return date.toLocaleDateString("en-CA");
+}
+
+export function getNextLocalMidnight(from = new Date()) {
+  return new Date(
+    from.getFullYear(),
+    from.getMonth(),
+    from.getDate() + 1,
+    0,
+    0,
+    0,
+    0,
+  );
+}
+
+export function getMillisecondsUntilLocalMidnight(from = new Date()) {
+  return Math.max(0, getNextLocalMidnight(from).getTime() - from.getTime());
+}
diff --git a/lib/habits-storage.ts b/lib/habits-storage.ts
index ec13018..e6495f9 100644
--- a/lib/habits-storage.ts
+++ b/lib/habits-storage.ts
@@ -16,6 +16,9 @@ import {
   getStreakMilestoneBonus,
 } from "@/lib/coins";
 import { createClient } from "@/lib/supabase/client";
+import { getTodayDateKey } from "@/lib/date-keys";
+
+export { getTodayDateKey };
 
 export type Habit = {
   id: string;
@@ -43,10 +46,6 @@ type HabitRow = {
 const habitSelectFields =
   "id, name, streak, last_completed_on, claimed_streak_milestones";
 
-export function getTodayDateKey(date = new Date()) {
-  return date.toISOString().slice(0, 10);
-}
-
 function getDayDiff(fromDate: string, toDate: string) {
   const from = new Date(`${fromDate}T00:00:00`);
   const to = new Date(`${toDate}T00:00:00`);