diff --git a/client/src/components/daily-coding-challenge/calendar-day.tsx b/client/src/components/daily-coding-challenge/calendar-day.tsx
index 5c8391dccd0..f76eae7b43d 100644
--- a/client/src/components/daily-coding-challenge/calendar-day.tsx
+++ b/client/src/components/daily-coding-challenge/calendar-day.tsx
@@ -29,6 +29,7 @@ function DailyCodingChallengeCalendarDay({
       <button
         disabled
         className='calendar-day not-available'
+        data-playwright-test-label='calendar-day'
         aria-label={`${date && formatDisplayDate(date)}, (${t('aria.not-available')})`}
       >
         <span className='calendar-day-number' aria-hidden='true'>
@@ -42,6 +43,7 @@ function DailyCodingChallengeCalendarDay({
     <Link
       to={`/learn/daily-coding-challenge?date=${date}`}
       className='calendar-day available'
+      data-playwright-test-label='calendar-day'
       aria-label={`${date && formatDisplayDate(date)}`}
     >
       <span className='calendar-day-number' aria-hidden='true'>
@@ -49,11 +51,17 @@ function DailyCodingChallengeCalendarDay({
       </span>
 
       {isCompleted ? (
-        <span className='completed'>
+        <span
+          className='completed'
+          data-playwright-test-label='calendar-day-completed'
+        >
           <GreenPass />
         </span>
       ) : (
-        <span className='not-completed'>
+        <span
+          className='not-completed'
+          data-playwright-test-label='calendar-day-not-completed'
+        >
           <GreenNotCompleted />
         </span>
       )}
diff --git a/e2e/daily-coding-challenge.spec.ts b/e2e/daily-coding-challenge.spec.ts
new file mode 100644
index 00000000000..f8c66f717d1
--- /dev/null
+++ b/e2e/daily-coding-challenge.spec.ts
@@ -0,0 +1,212 @@
+import { test, expect } from '@playwright/test';
+import {
+  getTodayUsCentral,
+  formatDate
+} from '../client/src/components/daily-coding-challenge/helpers';
+
+const dateRouteRe = /.*\/daily-coding-challenge\/date\/.*/;
+const allRouteRe = /.*\/daily-coding-challenge\/all/;
+
+const todayUsCentral = getTodayUsCentral();
+const [year, month, day] = todayUsCentral.split('-').map(Number);
+
+const todayMidnight = `${todayUsCentral}T00:00:00.000Z`;
+
+const mockApiChallenge = {
+  id: 'test-challenge-id',
+  challengeNumber: 1,
+  title: 'Test title',
+  date: todayMidnight,
+  description: 'Test description',
+  javascript: {
+    tests: [
+      {
+        text: 'Test text',
+        testString: 'assert.strictEqual(true, true);'
+      }
+    ],
+    challengeFiles: [
+      {
+        fileKey: 'scriptjs',
+        contents: '// JavaScript seed code'
+      }
+    ]
+  },
+  python: {
+    tests: [
+      {
+        text: 'Test text',
+        testString: '({test: () => { runPython(`assert True == True`)}})'
+      }
+    ],
+    challengeFiles: [
+      {
+        fileKey: 'mainpy',
+        contents: '# Python seed code'
+      }
+    ]
+  }
+};
+
+const mockApiAllChallenges = [
+  // today
+  {
+    // real ID from certified user so it shows completed in calendar
+    id: '6814d8e1516e86b171929de4',
+    date: todayMidnight
+  },
+  // yesterday, or tomorrow if today is the first
+  {
+    id: 'other-id',
+    date: `${formatDate({ year, month, day: day === 1 ? day + 1 : day - 1 })}T00:00:00.000Z`
+  }
+];
+
+const mockDaysInMonth = new Date(year, month, 0).getDate();
+
+test.describe('Daily Coding Challenges', () => {
+  test('should show not found page for invalid date', async ({ page }) => {
+    await page.goto('/learn/daily-coding-challenge?date=invalid-date');
+    await expect(
+      page.getByText(/daily coding challenge not found\./i)
+    ).toBeVisible();
+  });
+
+  test('should show not found page for date without challenge', async ({
+    page
+  }) => {
+    await page.route(dateRouteRe, async route => {
+      await route.fulfill({
+        status: 404,
+        headers: { 'Content-Type': 'application/json' },
+        json: { type: 'error', message: 'Challenge not found.' }
+      });
+    });
+
+    await page.goto('/learn/daily-coding-challenge?date=2025-01-01');
+    await expect(
+      page.getByText(/daily coding challenge not found\./i)
+    ).toBeVisible();
+  });
+
+  test('should show not found page for API error', async ({ page }) => {
+    await page.route(dateRouteRe, async route => {
+      await route.fulfill({
+        status: 500,
+        headers: { 'Content-Type': 'application/json' },
+        json: { type: 'error', message: 'Internal server error.' }
+      });
+    });
+
+    await page.goto('/learn/daily-coding-challenge?date=2025-01-01');
+    await expect(
+      page.getByText(/daily coding challenge not found\./i)
+    ).toBeVisible();
+  });
+
+  test('should show not found page for invalid challenge data', async ({
+    page
+  }) => {
+    await page.route(dateRouteRe, async route => {
+      await route.fulfill({
+        status: 200,
+        headers: { 'Content-Type': 'application/json' },
+        json: { invalid: 'data structure' }
+      });
+    });
+
+    await page.goto('/learn/daily-coding-challenge?date=2025-06-27');
+    await expect(
+      page.getByText(/daily coding challenge not found\./i)
+    ).toBeVisible();
+  });
+
+  test('should load and display a daily coding challenge with a valid date, and should be able to switch between JavaScript and Python', async ({
+    page
+  }) => {
+    await page.route(dateRouteRe, async route => {
+      await route.fulfill({
+        status: 200,
+        headers: { 'Content-Type': 'application/json' },
+        json: mockApiChallenge
+      });
+    });
+
+    await page.goto(`/learn/daily-coding-challenge?date=${todayUsCentral}`);
+
+    await expect(page.getByText('Test title')).toBeVisible();
+
+    await expect(page.getByText('Test description')).toBeVisible();
+
+    // Language buttons
+    await expect(
+      page.getByRole('button', { name: /javascript/i })
+    ).toBeVisible();
+    await expect(page.getByRole('button', { name: /python/i })).toBeVisible();
+
+    // Should show JS UI by default
+
+    await expect(
+      page.getByRole('button', { name: /script.js/i })
+    ).toBeVisible();
+    await expect(
+      page.getByRole('button', { name: /main.py/i })
+    ).not.toBeVisible();
+    await expect(page.getByRole('button', { name: /console/i })).toBeVisible();
+    await expect(page.getByTestId('preview-pane-button')).not.toBeVisible();
+    await expect(page.locator("div[role='code'].monaco-editor")).toContainText(
+      '// JavaScript seed code'
+    );
+
+    // Show show Python UI after changing language
+    await page.getByRole('button', { name: /python/i }).click();
+
+    await expect(page.getByRole('button', { name: /main.py/i })).toBeVisible();
+    await expect(
+      page.getByRole('button', { name: /script.js/i })
+    ).not.toBeVisible();
+    await expect(page.getByRole('button', { name: /console/i })).toBeVisible();
+    await expect(page.getByTestId('preview-pane-button')).toBeVisible();
+    await expect(page.locator("div[role='code'].monaco-editor")).toContainText(
+      '# Python seed code'
+    );
+
+    await page.goto(`/learn/daily-coding-challenge?date=${todayUsCentral}`);
+
+    await expect(page.getByRole('button', { name: /main.py/i })).toBeVisible();
+  });
+});
+
+test.describe('Daily Coding Challenge Archive', () => {
+  test('should load and display the calendar', async ({ page }) => {
+    await page.route(allRouteRe, async route => {
+      await route.fulfill({
+        status: 200,
+        headers: { 'Content-Type': 'application/json' },
+        json: mockApiAllChallenges
+      });
+    });
+
+    await page.goto('/learn/daily-coding-challenge/archive');
+
+    await expect(page.getByText('Daily Coding Challenges')).toBeVisible();
+
+    await expect(
+      page.getByRole('button', { name: /previous month/i })
+    ).toBeVisible();
+    await expect(
+      page.getByRole('button', { name: /next month/i })
+    ).toBeVisible();
+
+    await expect(
+      page.getByRole('link', { name: /go to today/i })
+    ).toBeVisible();
+
+    const totalCalendarDays = await page.getByTestId('calendar-day').count();
+    expect(totalCalendarDays).toBe(mockDaysInMonth);
+
+    await expect(page.getByTestId('calendar-day-completed')).toHaveCount(1);
+
+    await expect(page.getByTestId('calendar-day-not-completed')).toHaveCount(1);
+  });
+});
diff --git a/sample.env b/sample.env
index a1896c43c63..105ca6f49e0 100644
--- a/sample.env
+++ b/sample.env
@@ -54,7 +54,7 @@ CURRICULUM_LOCALE=english
 
 # Show or hide WIP in progress challenges
 SHOW_UPCOMING_CHANGES=false
-SHOW_DAILY_CODING_CHALLENGES=false
+SHOW_DAILY_CODING_CHALLENGES=true
 
 # ---------------------
 # New API
diff --git a/tools/scripts/seed/user-data.js b/tools/scripts/seed/user-data.js
index b6ccb87e320..3ea49b2cecb 100644
--- a/tools/scripts/seed/user-data.js
+++ b/tools/scripts/seed/user-data.js
@@ -12281,6 +12281,13 @@ module.exports.fullyCertifiedUser = {
       id: '672d456f4ac35950b300e93f'
     }
   ],
+  completedDailyCodingChallenges: [
+    {
+      id: '6814d8e1516e86b171929de4',
+      completedDate: 1729240849345,
+      languages: ['javascript']
+    }
+  ],
   completedExams: [
     {
       id: '647e22d18acb466c97ccbef8',