diff --git a/app/src/agentworld/pages/JobsSection.test.tsx b/app/src/agentworld/pages/JobsSection.test.tsx
index 6d883101b..4baa333eb 100644
--- a/app/src/agentworld/pages/JobsSection.test.tsx
+++ b/app/src/agentworld/pages/JobsSection.test.tsx
@@ -620,3 +620,99 @@ describe('Jobs write actions', () => {
     });
   });
 });
+
+// ── Proposal deadline normalization ───────────────────────────────────────────
+
+describe('Proposal deadline normalization', () => {
+  // Helper: open the Post Job modal and fill required fields.
+  async function openPostJobModal(user: ReturnType<typeof userEvent.setup>) {
+    vi.mocked(fetchWalletStatus).mockResolvedValue(sampleWalletStatus as any);
+    vi.mocked(apiClient.graphql.jobs).mockResolvedValue({ jobs: [], count: 0 });
+
+    render(<JobsSection />);
+
+    await waitFor(() => {
+      expect(screen.getByRole('button', { name: /post a job/i })).toBeInTheDocument();
+    });
+
+    await user.click(screen.getByRole('button', { name: /post a job/i }));
+
+    // Fill required fields: title and budget amount.
+    await user.type(screen.getByPlaceholderText(/build a solana/i), 'Test Job Title');
+    await user.type(screen.getByPlaceholderText('500'), '100');
+  }
+
+  test('date-only input is normalized to RFC3339 end-of-day UTC before submit', async () => {
+    const user = userEvent.setup();
+    vi.mocked(apiClient.jobsWrite.create).mockResolvedValue(sampleJob as any);
+    await openPostJobModal(user);
+
+    // Use fireEvent to set the date input — userEvent doesn't drive date pickers.
+    // The modal has exactly one input[type="date"] (Proposal Deadline).
+    const { fireEvent } = await import('@testing-library/react');
+    const dateInput = document.querySelector('input[type="date"]') as HTMLInputElement;
+    fireEvent.change(dateInput, { target: { value: '2099-12-31' } });
+
+    await user.click(screen.getByRole('button', { name: /post job/i }));
+
+    await waitFor(() => {
+      expect(vi.mocked(apiClient.jobsWrite.create)).toHaveBeenCalledWith(
+        expect.objectContaining({ proposalDeadline: '2099-12-31T23:59:59Z' })
+      );
+    });
+  });
+
+  test('empty deadline is omitted (sent as undefined)', async () => {
+    const user = userEvent.setup();
+    vi.mocked(apiClient.jobsWrite.create).mockResolvedValue(sampleJob as any);
+    await openPostJobModal(user);
+
+    // Leave the deadline blank and submit.
+    await user.click(screen.getByRole('button', { name: /post job/i }));
+
+    await waitFor(() => {
+      expect(vi.mocked(apiClient.jobsWrite.create)).toHaveBeenCalledWith(
+        expect.objectContaining({ proposalDeadline: undefined })
+      );
+    });
+  });
+
+  test('past deadline shows validation error and does not call create', async () => {
+    const user = userEvent.setup();
+    vi.mocked(apiClient.jobsWrite.create).mockResolvedValue(sampleJob as any);
+    await openPostJobModal(user);
+
+    const { fireEvent } = await import('@testing-library/react');
+    const dateInput = document.querySelector('input[type="date"]') as HTMLInputElement;
+    fireEvent.change(dateInput, { target: { value: '2020-01-01' } });
+
+    await user.click(screen.getByRole('button', { name: /post job/i }));
+
+    await waitFor(() => {
+      expect(screen.getByText(/proposal deadline must be in the future/i)).toBeInTheDocument();
+    });
+    expect(vi.mocked(apiClient.jobsWrite.create)).not.toHaveBeenCalled();
+  });
+
+  test('current-day deadline shows validation error and does not call create', async () => {
+    const user = userEvent.setup();
+    vi.mocked(apiClient.jobsWrite.create).mockResolvedValue(sampleJob as any);
+    await openPostJobModal(user);
+
+    // Build today's date in YYYY-MM-DD using local calendar (same logic as
+    // the component) to ensure the guard fires regardless of UTC offset.
+    const now = new Date();
+    const today = `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2, '0')}-${String(now.getDate()).padStart(2, '0')}`;
+
+    const { fireEvent } = await import('@testing-library/react');
+    const dateInput = document.querySelector('input[type="date"]') as HTMLInputElement;
+    fireEvent.change(dateInput, { target: { value: today } });
+
+    await user.click(screen.getByRole('button', { name: /post job/i }));
+
+    await waitFor(() => {
+      expect(screen.getByText(/proposal deadline must be in the future/i)).toBeInTheDocument();
+    });
+    expect(vi.mocked(apiClient.jobsWrite.create)).not.toHaveBeenCalled();
+  });
+});
diff --git a/app/src/agentworld/pages/JobsSection.tsx b/app/src/agentworld/pages/JobsSection.tsx
index a7386f4bf..73206f6e8 100644
--- a/app/src/agentworld/pages/JobsSection.tsx
+++ b/app/src/agentworld/pages/JobsSection.tsx
@@ -25,6 +25,7 @@ import {
   type Proposal,
   type ProposalCreateParams,
 } from '../../lib/agentworld/invokeApiClient';
+import { useT } from '../../lib/i18n/I18nContext';
 import { fetchWalletStatus } from '../../services/walletApi';
 import { apiClient } from '../AgentWorldShell';
 import { explorerTxUrl } from '../hooks/useX402Buy';
@@ -187,6 +188,7 @@ function ClientAvatar({ avatarUrl, displayName }: { avatarUrl?: string; displayN
 // ── PostJobModal ──────────────────────────────────────────────────────────────
 
 function PostJobModal({ onClose, onCreated }: { onClose: () => void; onCreated: () => void }) {
+  const { t } = useT();
   const [title, setTitle] = useState('');
   const [description, setDescription] = useState('');
   const [category, setCategory] = useState('');
@@ -202,6 +204,22 @@ function PostJobModal({ onClose, onCreated }: { onClose: () => void; onCreated:
     if (!title.trim() || !budgetAmount.trim()) return;
     setSubmitting(true);
     setError(null);
+    // <input type="date"> yields "YYYY-MM-DD" but the server requires RFC3339.
+    // Pin to end-of-day UTC, consistent with BountiesSection.
+    const deadlineDate = proposalDeadline.trim();
+    const deadlineIso = deadlineDate ? `${deadlineDate}T23:59:59Z` : undefined;
+    // Reject today and past dates by comparing the raw date string against the
+    // local calendar date — end-of-day UTC would otherwise let "today" pass
+    // until midnight UTC.
+    if (deadlineDate) {
+      const now = new Date();
+      const todayLocal = `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2, '0')}-${String(now.getDate()).padStart(2, '0')}`;
+      if (deadlineDate <= todayLocal) {
+        setError(t('agentWorld.jobs.deadlineFuture', 'Proposal deadline must be in the future'));
+        setSubmitting(false);
+        return;
+      }
+    }
     const params: JobCreateParams = {
       title: title.trim(),
       description: description.trim() || undefined,
@@ -214,7 +232,7 @@ function PostJobModal({ onClose, onCreated }: { onClose: () => void; onCreated:
         : undefined,
       budgetAmount: budgetAmount.trim(),
       budgetAsset: budgetAsset.trim() || 'USDC',
-      proposalDeadline: proposalDeadline || undefined,
+      proposalDeadline: deadlineIso,
     };
     try {
       await apiClient.jobsWrite.create(params);
diff --git a/app/src/lib/i18n/ar.ts b/app/src/lib/i18n/ar.ts
index a2ed7ca88..b47eba485 100644
--- a/app/src/lib/i18n/ar.ts
+++ b/app/src/lib/i18n/ar.ts
@@ -52,6 +52,7 @@ const messages: TranslationMap = {
   'agentWorld.profiles': 'الملفات الشخصية',
   'agentWorld.marketplace': 'السوق',
   'agentWorld.messaging': 'الرسائل',
+  'agentWorld.jobs.deadlineFuture': 'يجب أن يكون الموعد النهائي للمقترح في المستقبل',
   'nav.avatarMenu.account': 'الحساب',
   'nav.avatarMenu.billing': 'الفواتير',
   'nav.avatarMenu.rewards': 'المكافآت',
diff --git a/app/src/lib/i18n/bn.ts b/app/src/lib/i18n/bn.ts
index 4ec047b81..5fbb3944c 100644
--- a/app/src/lib/i18n/bn.ts
+++ b/app/src/lib/i18n/bn.ts
@@ -52,6 +52,7 @@ const messages: TranslationMap = {
   'agentWorld.profiles': 'প্রোফাইল',
   'agentWorld.marketplace': 'মার্কেটপ্লেস',
   'agentWorld.messaging': 'বার্তা',
+  'agentWorld.jobs.deadlineFuture': 'প্রস্তাবের সময়সীমা ভবিষ্যতে হতে হবে',
   'nav.avatarMenu.account': 'অ্যাকাউন্ট',
   'nav.avatarMenu.billing': 'বিলিং',
   'nav.avatarMenu.rewards': 'পুরস্কার',
diff --git a/app/src/lib/i18n/de.ts b/app/src/lib/i18n/de.ts
index 9a2da8787..48efc27a1 100644
--- a/app/src/lib/i18n/de.ts
+++ b/app/src/lib/i18n/de.ts
@@ -52,6 +52,7 @@ const messages: TranslationMap = {
   'agentWorld.profiles': 'Profile',
   'agentWorld.marketplace': 'Marktplatz',
   'agentWorld.messaging': 'Nachrichten',
+  'agentWorld.jobs.deadlineFuture': 'Die Angebotsfrist muss in der Zukunft liegen',
   'nav.avatarMenu.account': 'Konto',
   'nav.avatarMenu.billing': 'Abrechnung',
   'nav.avatarMenu.rewards': 'Prämien',
diff --git a/app/src/lib/i18n/en.ts b/app/src/lib/i18n/en.ts
index d411a8281..c3ba97cde 100644
--- a/app/src/lib/i18n/en.ts
+++ b/app/src/lib/i18n/en.ts
@@ -37,6 +37,7 @@ const en: TranslationMap = {
   'agentWorld.profiles': 'Profiles',
   'agentWorld.marketplace': 'Marketplace',
   'agentWorld.messaging': 'Messages',
+  'agentWorld.jobs.deadlineFuture': 'Proposal deadline must be in the future',
   // Agent World — Settings section UI
   'nav.avatarMenu.account': 'Account',
   'nav.avatarMenu.billing': 'Billing',
diff --git a/app/src/lib/i18n/es.ts b/app/src/lib/i18n/es.ts
index 9ec576577..6b5f30cca 100644
--- a/app/src/lib/i18n/es.ts
+++ b/app/src/lib/i18n/es.ts
@@ -52,6 +52,7 @@ const messages: TranslationMap = {
   'agentWorld.profiles': 'Perfiles',
   'agentWorld.marketplace': 'Mercado',
   'agentWorld.messaging': 'Mensajes',
+  'agentWorld.jobs.deadlineFuture': 'La fecha límite de la propuesta debe ser en el futuro',
   'nav.avatarMenu.account': 'Cuenta',
   'nav.avatarMenu.billing': 'Facturación',
   'nav.avatarMenu.rewards': 'Recompensas',
diff --git a/app/src/lib/i18n/fr.ts b/app/src/lib/i18n/fr.ts
index a37147247..1d359d320 100644
--- a/app/src/lib/i18n/fr.ts
+++ b/app/src/lib/i18n/fr.ts
@@ -52,6 +52,7 @@ const messages: TranslationMap = {
   'agentWorld.profiles': 'Profils',
   'agentWorld.marketplace': 'Marché',
   'agentWorld.messaging': 'Messages',
+  'agentWorld.jobs.deadlineFuture': 'La date limite de la proposition doit être dans le futur',
   'nav.avatarMenu.account': 'Compte',
   'nav.avatarMenu.billing': 'Facturation',
   'nav.avatarMenu.rewards': 'Récompenses',
diff --git a/app/src/lib/i18n/hi.ts b/app/src/lib/i18n/hi.ts
index 1c8ed7fa1..d8dca6440 100644
--- a/app/src/lib/i18n/hi.ts
+++ b/app/src/lib/i18n/hi.ts
@@ -52,6 +52,7 @@ const messages: TranslationMap = {
   'agentWorld.profiles': 'प्रोफ़ाइल',
   'agentWorld.marketplace': 'मार्केटप्लेस',
   'agentWorld.messaging': 'संदेश',
+  'agentWorld.jobs.deadlineFuture': 'प्रस्ताव की समय सीमा भविष्य में होनी चाहिए',
   'nav.avatarMenu.account': 'खाता',
   'nav.avatarMenu.billing': 'बिलिंग',
   'nav.avatarMenu.rewards': 'रिवॉर्ड',
diff --git a/app/src/lib/i18n/id.ts b/app/src/lib/i18n/id.ts
index 365d58c1a..de6e6081e 100644
--- a/app/src/lib/i18n/id.ts
+++ b/app/src/lib/i18n/id.ts
@@ -52,6 +52,7 @@ const messages: TranslationMap = {
   'agentWorld.profiles': 'Profil',
   'agentWorld.marketplace': 'Pasar',
   'agentWorld.messaging': 'Pesan',
+  'agentWorld.jobs.deadlineFuture': 'Batas waktu proposal harus di masa depan',
   'nav.avatarMenu.account': 'Akun',
   'nav.avatarMenu.billing': 'Tagihan',
   'nav.avatarMenu.rewards': 'Hadiah',
diff --git a/app/src/lib/i18n/it.ts b/app/src/lib/i18n/it.ts
index af50a803e..826aece0e 100644
--- a/app/src/lib/i18n/it.ts
+++ b/app/src/lib/i18n/it.ts
@@ -52,6 +52,7 @@ const messages: TranslationMap = {
   'agentWorld.profiles': 'Profili',
   'agentWorld.marketplace': 'Mercato',
   'agentWorld.messaging': 'Messaggi',
+  'agentWorld.jobs.deadlineFuture': 'La scadenza della proposta deve essere nel futuro',
   'nav.avatarMenu.account': 'Account',
   'nav.avatarMenu.billing': 'Fatturazione',
   'nav.avatarMenu.rewards': 'Premi',
diff --git a/app/src/lib/i18n/ko.ts b/app/src/lib/i18n/ko.ts
index 3290d9aaa..a14baef54 100644
--- a/app/src/lib/i18n/ko.ts
+++ b/app/src/lib/i18n/ko.ts
@@ -52,6 +52,7 @@ const messages: TranslationMap = {
   'agentWorld.profiles': '프로필',
   'agentWorld.marketplace': '마켓플레이스',
   'agentWorld.messaging': '메시지',
+  'agentWorld.jobs.deadlineFuture': '제안 마감일은 미래여야 합니다',
   'nav.avatarMenu.account': '계정',
   'nav.avatarMenu.billing': '결제',
   'nav.avatarMenu.rewards': '보상',
diff --git a/app/src/lib/i18n/pl.ts b/app/src/lib/i18n/pl.ts
index 2e46a3ed3..e0a81c719 100644
--- a/app/src/lib/i18n/pl.ts
+++ b/app/src/lib/i18n/pl.ts
@@ -52,6 +52,7 @@ const messages: TranslationMap = {
   'agentWorld.profiles': 'Profile',
   'agentWorld.marketplace': 'Rynek',
   'agentWorld.messaging': 'Wiadomości',
+  'agentWorld.jobs.deadlineFuture': 'Termin złożenia oferty musi być w przyszłości',
   'nav.avatarMenu.account': 'Konto',
   'nav.avatarMenu.billing': 'Rozliczenia',
   'nav.avatarMenu.rewards': 'Nagrody',
diff --git a/app/src/lib/i18n/pt.ts b/app/src/lib/i18n/pt.ts
index d9aa1b4fd..abde792f9 100644
--- a/app/src/lib/i18n/pt.ts
+++ b/app/src/lib/i18n/pt.ts
@@ -52,6 +52,7 @@ const messages: TranslationMap = {
   'agentWorld.profiles': 'Perfis',
   'agentWorld.marketplace': 'Mercado',
   'agentWorld.messaging': 'Mensagens',
+  'agentWorld.jobs.deadlineFuture': 'O prazo da proposta deve ser no futuro',
   'nav.avatarMenu.account': 'Conta',
   'nav.avatarMenu.billing': 'Faturamento',
   'nav.avatarMenu.rewards': 'Recompensas',
diff --git a/app/src/lib/i18n/ru.ts b/app/src/lib/i18n/ru.ts
index 9d6564065..aa882e246 100644
--- a/app/src/lib/i18n/ru.ts
+++ b/app/src/lib/i18n/ru.ts
@@ -52,6 +52,7 @@ const messages: TranslationMap = {
   'agentWorld.profiles': 'Профили',
   'agentWorld.marketplace': 'Маркетплейс',
   'agentWorld.messaging': 'Сообщения',
+  'agentWorld.jobs.deadlineFuture': 'Срок подачи предложения должен быть в будущем',
   'nav.avatarMenu.account': 'Аккаунт',
   'nav.avatarMenu.billing': 'Оплата',
   'nav.avatarMenu.rewards': 'Награды',
diff --git a/app/src/lib/i18n/zh-CN.ts b/app/src/lib/i18n/zh-CN.ts
index 42137506a..6241d23f8 100644
--- a/app/src/lib/i18n/zh-CN.ts
+++ b/app/src/lib/i18n/zh-CN.ts
@@ -52,6 +52,7 @@ const messages: TranslationMap = {
   'agentWorld.profiles': '档案',
   'agentWorld.marketplace': '市场',
   'agentWorld.messaging': '消息',
+  'agentWorld.jobs.deadlineFuture': '提案截止日期必须是将来的日期',
   'nav.avatarMenu.account': '账户',
   'nav.avatarMenu.billing': '账单',
   'nav.avatarMenu.rewards': '奖励',