diff --git a/apps/admin-web/src/api/adminApiTypes.ts b/apps/admin-web/src/api/adminApiTypes.ts
index 0322d9e9d..0cc109130 100644
--- a/apps/admin-web/src/api/adminApiTypes.ts
+++ b/apps/admin-web/src/api/adminApiTypes.ts
@@ -553,6 +553,8 @@ export interface AdminUpsertProfileRedeemCodeRequest {
   enabled: boolean;
   allowedUserIds: string[];
   allowedPublicUserCodes: string[];
+  startsAt?: string | null;
+  expiresAt?: string | null;
 }
 
 export interface AdminUpsertProfileInviteCodeRequest {
@@ -614,6 +616,8 @@ export interface ProfileRedeemCodeAdminResponse {
   globalUsedCount: number;
   enabled: boolean;
   allowedUserIds: string[];
+  startsAt?: string | null;
+  expiresAt?: string | null;
   createdBy: string;
   createdAt: string;
   updatedAt: string;
diff --git a/apps/admin-web/src/pages/AdminRedeemCodePage.test.tsx b/apps/admin-web/src/pages/AdminRedeemCodePage.test.tsx
new file mode 100644
index 000000000..2e3884bdd
--- /dev/null
+++ b/apps/admin-web/src/pages/AdminRedeemCodePage.test.tsx
@@ -0,0 +1,166 @@
+/* @vitest-environment jsdom */
+
+import { fireEvent, render, screen, waitFor } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { beforeEach, expect, test, vi } from 'vitest';
+
+import {
+  disableProfileRedeemCode,
+  listProfileRedeemCodes,
+  upsertProfileRedeemCode,
+} from '../api/adminApiClient';
+import type { ProfileRedeemCodeAdminResponse } from '../api/adminApiTypes';
+import { AdminRedeemCodePage } from './AdminRedeemCodePage';
+
+vi.mock('../api/adminApiClient', () => ({
+  disableProfileRedeemCode: vi.fn(),
+  formatAdminApiError: vi.fn((error: unknown) =>
+    error instanceof Error ? error.message : '请求失败',
+  ),
+  isAdminApiError: vi.fn(() => false),
+  listProfileRedeemCodes: vi.fn(),
+  upsertProfileRedeemCode: vi.fn(),
+}));
+
+const baseEntry: ProfileRedeemCodeAdminResponse = {
+  code: 'LONG-LIVED',
+  mode: 'public',
+  rewardPoints: 100,
+  maxUses: 1,
+  globalUsedCount: 0,
+  enabled: true,
+  allowedUserIds: [],
+  startsAt: null,
+  expiresAt: null,
+  createdBy: 'admin',
+  createdAt: '2026-07-13T01:00:00Z',
+  updatedAt: '2026-07-13T01:00:00Z',
+};
+
+const entries: ProfileRedeemCodeAdminResponse[] = [
+  baseEntry,
+  {
+    ...baseEntry,
+    code: 'PENDING',
+    startsAt: '2999-01-01T00:00:00Z',
+  },
+  {
+    ...baseEntry,
+    code: 'EXPIRED',
+    expiresAt: '2000-01-01T00:00:00Z',
+  },
+  {
+    ...baseEntry,
+    code: 'ACTIVE',
+    startsAt: '2000-01-01T00:00:00Z',
+    expiresAt: '2999-01-01T00:00:00Z',
+  },
+  {
+    ...baseEntry,
+    code: 'DISABLED',
+    enabled: false,
+    startsAt: '2000-01-01T00:00:00Z',
+    expiresAt: '2999-01-01T00:00:00Z',
+  },
+];
+
+beforeEach(() => {
+  vi.clearAllMocks();
+  vi.mocked(listProfileRedeemCodes).mockResolvedValue({
+    entries,
+    operations: [],
+  });
+  vi.mocked(upsertProfileRedeemCode).mockResolvedValue(baseEntry);
+  vi.mocked(disableProfileRedeemCode).mockResolvedValue({
+    ...baseEntry,
+    enabled: false,
+  });
+});
+
+test('兑换码列表展示生效状态与日期范围', async () => {
+  render(<AdminRedeemCodePage token="admin-token" onUnauthorized={vi.fn()} />);
+
+  expect((await rowForCode('LONG-LIVED')).textContent).toContain('长期有效');
+  expect((await rowForCode('LONG-LIVED')).textContent).toContain('立即 / 长期');
+  expect((await rowForCode('PENDING')).textContent).toContain('未生效');
+  expect((await rowForCode('EXPIRED')).textContent).toContain('已过期');
+  expect((await rowForCode('ACTIVE')).textContent).toContain('有效');
+  expect((await rowForCode('DISABLED')).textContent).toContain('停用');
+});
+
+test('点击兑换码回填本地日期输入', async () => {
+  const user = userEvent.setup();
+  render(<AdminRedeemCodePage token="admin-token" onUnauthorized={vi.fn()} />);
+
+  await user.click(await screen.findByRole('button', { name: 'ACTIVE' }));
+
+  expect((screen.getByLabelText('开始时间') as HTMLInputElement).value).toBe(
+    toLocalInputValue('2000-01-01T00:00:00Z'),
+  );
+  expect((screen.getByLabelText('截止时间') as HTMLInputElement).value).toBe(
+    toLocalInputValue('2999-01-01T00:00:00Z'),
+  );
+});
+
+test('兑换码拒绝截止时间不晚于开始时间的配置', async () => {
+  render(<AdminRedeemCodePage token="admin-token" onUnauthorized={vi.fn()} />);
+  await screen.findByRole('button', { name: 'LONG-LIVED' });
+
+  fireEvent.change(screen.getByLabelText('Code'), {
+    target: { value: 'INVALID' },
+  });
+  fireEvent.change(screen.getByLabelText('开始时间'), {
+    target: { value: '2026-07-13T10:00' },
+  });
+  fireEvent.change(screen.getByLabelText('截止时间'), {
+    target: { value: '2026-07-13T10:00' },
+  });
+
+  expect(screen.getByText('截止时间必须晚于开始时间')).toBeTruthy();
+  expect(
+    (screen.getByRole('button', { name: '保存' }) as HTMLButtonElement)
+      .disabled,
+  ).toBe(true);
+  expect(upsertProfileRedeemCode).not.toHaveBeenCalled();
+});
+
+test('兑换码保存时把本地时间转换为 ISO 并保留空边界', async () => {
+  const user = userEvent.setup();
+  render(<AdminRedeemCodePage token="admin-token" onUnauthorized={vi.fn()} />);
+  await screen.findByRole('button', { name: 'LONG-LIVED' });
+
+  fireEvent.change(screen.getByLabelText('Code'), {
+    target: { value: 'WINDOWED' },
+  });
+  fireEvent.change(screen.getByLabelText('开始时间'), {
+    target: { value: '2026-07-13T10:30' },
+  });
+  await user.click(screen.getByRole('button', { name: '保存' }));
+  await user.click(screen.getByRole('button', { name: '确认' }));
+
+  await waitFor(() => {
+    expect(upsertProfileRedeemCode).toHaveBeenCalledWith(
+      'admin-token',
+      expect.objectContaining({
+        code: 'WINDOWED',
+        startsAt: new Date('2026-07-13T10:30').toISOString(),
+        expiresAt: null,
+      }),
+    );
+  });
+});
+
+async function rowForCode(code: string) {
+  const button = await screen.findByRole('button', { name: code });
+  const row = button.closest('tr');
+  if (!row) {
+    throw new Error(`未找到兑换码 ${code} 所在行`);
+  }
+  return row;
+}
+
+function toLocalInputValue(value: string) {
+  const date = new Date(value);
+  const offsetMs = date.getTimezoneOffset() * 60 * 1000;
+  return new Date(date.getTime() - offsetMs).toISOString().slice(0, 16);
+}
diff --git a/apps/admin-web/src/pages/AdminRedeemCodePage.tsx b/apps/admin-web/src/pages/AdminRedeemCodePage.tsx
index f1df9c315..6afe195d5 100644
--- a/apps/admin-web/src/pages/AdminRedeemCodePage.tsx
+++ b/apps/admin-web/src/pages/AdminRedeemCodePage.tsx
@@ -34,6 +34,8 @@ export function AdminRedeemCodePage({
   const [rewardPoints, setRewardPoints] = useState('100');
   const [maxUses, setMaxUses] = useState('1');
   const [enabled, setEnabled] = useState(true);
+  const [startsAt, setStartsAt] = useState('');
+  const [expiresAt, setExpiresAt] = useState('');
   const [allowedUserIds, setAllowedUserIds] = useState('');
   const [allowedPublicUserCodes, setAllowedPublicUserCodes] = useState('');
   const [disableCode, setDisableCode] = useState('');
@@ -73,6 +75,12 @@ export function AdminRedeemCodePage({
     }
 
     setErrorMessage('');
+    const validityError = validateValidityWindow(startsAt, expiresAt);
+    if (validityError) {
+      setErrorMessage(validityError);
+      return;
+    }
+
     const confirmed = await confirmWrite({
       action: '保存兑换码',
       target: code.trim(),
@@ -92,6 +100,8 @@ export function AdminRedeemCodePage({
         allowedUserIds: mode === 'private' ? splitLines(allowedUserIds) : [],
         allowedPublicUserCodes:
           mode === 'private' ? splitLines(allowedPublicUserCodes) : [],
+        startsAt: startsAt ? toIsoDateTime(startsAt) : null,
+        expiresAt: expiresAt ? toIsoDateTime(expiresAt) : null,
       });
       fillForm(response);
       await refreshRedeemCodes();
@@ -137,11 +147,15 @@ export function AdminRedeemCodePage({
     setRewardPoints(String(entry.rewardPoints));
     setMaxUses(String(entry.maxUses));
     setEnabled(entry.enabled);
+    setStartsAt(toDateTimeLocalValue(entry.startsAt));
+    setExpiresAt(toDateTimeLocalValue(entry.expiresAt));
     setAllowedUserIds(entry.allowedUserIds.join('\n'));
     setAllowedPublicUserCodes('');
     setDisableCode(entry.code);
   }
 
+  const validityError = validateValidityWindow(startsAt, expiresAt);
+
   return (
     <section className="admin-page">
       <div className="admin-page-heading">
@@ -222,6 +236,25 @@ export function AdminRedeemCodePage({
             </label>
           </div>
 
+          <div className="admin-form-row">
+            <label className="admin-field">
+              <span>开始时间</span>
+              <input
+                type="datetime-local"
+                value={startsAt}
+                onChange={(event) => setStartsAt(event.target.value)}
+              />
+            </label>
+            <label className="admin-field">
+              <span>截止时间</span>
+              <input
+                type="datetime-local"
+                value={expiresAt}
+                onChange={(event) => setExpiresAt(event.target.value)}
+              />
+            </label>
+          </div>
+
           {mode === 'private' ? (
             <div className="admin-form-row">
               <label className="admin-field">
@@ -250,6 +283,11 @@ export function AdminRedeemCodePage({
               {errorMessage}
             </div>
           ) : null}
+          {validityError && validityError !== errorMessage ? (
+            <div className="admin-alert" role="status">
+              {validityError}
+            </div>
+          ) : null}
 
           <button
             className="admin-primary-button"
@@ -257,7 +295,8 @@ export function AdminRedeemCodePage({
               isSaving ||
               !code.trim() ||
               !parsePositiveInteger(rewardPoints) ||
-              !parsePositiveInteger(maxUses)
+              !parsePositiveInteger(maxUses) ||
+              Boolean(validityError)
             }
             type="submit"
           >
@@ -280,6 +319,7 @@ export function AdminRedeemCodePage({
                       <th>Code</th>
                       <th>奖励</th>
                       <th>状态</th>
+                      <th>有效期</th>
                     </tr>
                   </thead>
                   <tbody>
@@ -296,7 +336,16 @@ export function AdminRedeemCodePage({
                           <small>{redeemModeLabel(entry.mode)}</small>
                         </td>
                         <td>{entry.rewardPoints}</td>
-                        <td>{entry.enabled ? '启用' : '停用'}</td>
+                        <td>
+                          <span
+                            className={`admin-status ${redeemValidityClass(entry)}`}
+                          >
+                            {redeemValidityLabel(entry)}
+                          </span>
+                        </td>
+                        <td>
+                          <small>{formatValidityWindow(entry)}</small>
+                        </td>
                       </tr>
                     ))}
                   </tbody>
@@ -400,3 +449,76 @@ function formatDateTime(value: string) {
   }
   return date.toLocaleString('zh-CN', {hour12: false});
 }
+
+function validateValidityWindow(startsAt: string, expiresAt: string) {
+  if (!startsAt || !expiresAt) {
+    return '';
+  }
+
+  const startsAtTime = Date.parse(toIsoDateTime(startsAt));
+  const expiresAtTime = Date.parse(toIsoDateTime(expiresAt));
+  if (!Number.isFinite(startsAtTime) || !Number.isFinite(expiresAtTime)) {
+    return '有效期时间无效';
+  }
+
+  return startsAtTime < expiresAtTime ? '' : '截止时间必须晚于开始时间';
+}
+
+function toIsoDateTime(value: string) {
+  const time = Date.parse(value);
+  if (!Number.isFinite(time)) {
+    throw new Error('有效期时间无效');
+  }
+  return new Date(time).toISOString();
+}
+
+function toDateTimeLocalValue(value?: string | null) {
+  if (!value) {
+    return '';
+  }
+
+  const date = new Date(value);
+  if (!Number.isFinite(date.getTime())) {
+    return '';
+  }
+
+  const offsetMs = date.getTimezoneOffset() * 60 * 1000;
+  return new Date(date.getTime() - offsetMs).toISOString().slice(0, 16);
+}
+
+function redeemValidityLabel(entry: ProfileRedeemCodeAdminResponse) {
+  if (!entry.enabled) {
+    return '停用';
+  }
+
+  const now = Date.now();
+  const startsAtTime = entry.startsAt ? Date.parse(entry.startsAt) : null;
+  const expiresAtTime = entry.expiresAt ? Date.parse(entry.expiresAt) : null;
+  if (startsAtTime !== null && Number.isFinite(startsAtTime) && now < startsAtTime) {
+    return '未生效';
+  }
+  if (expiresAtTime !== null && Number.isFinite(expiresAtTime) && now >= expiresAtTime) {
+    return '已过期';
+  }
+  if (entry.startsAt || entry.expiresAt) {
+    return '有效';
+  }
+  return '长期有效';
+}
+
+function redeemValidityClass(entry: ProfileRedeemCodeAdminResponse) {
+  const label = redeemValidityLabel(entry);
+  if (label === '停用' || label === '已过期') {
+    return 'admin-status-error';
+  }
+  if (label === '未生效') {
+    return 'admin-status-pending';
+  }
+  return 'admin-status-ok';
+}
+
+function formatValidityWindow(entry: ProfileRedeemCodeAdminResponse) {
+  const startsAt = entry.startsAt ? formatDateTime(entry.startsAt) : '立即';
+  const expiresAt = entry.expiresAt ? formatDateTime(entry.expiresAt) : '长期';
+  return `${startsAt} / ${expiresAt}`;
+}
diff --git a/apps/admin-web/src/styles/admin.css b/apps/admin-web/src/styles/admin.css
index f71fc107b..bbee95ac6 100644
--- a/apps/admin-web/src/styles/admin.css
+++ b/apps/admin-web/src/styles/admin.css
@@ -121,17 +121,21 @@ button:disabled {
 
 .admin-shell {
   display: grid;
+  height: 100dvh;
   min-height: 100dvh;
   grid-template-columns: 232px minmax(0, 1fr);
+  overflow: hidden;
 }
 
 .admin-sidebar {
   display: flex;
+  min-height: 0;
   flex-direction: column;
   gap: 24px;
   border-right: 1px solid #e1ccbb;
   background: #ffffff;
   padding: 22px 18px;
+  overflow-y: auto;
 }
 
 .admin-brand strong {
@@ -176,7 +180,9 @@ button:disabled {
 .admin-main {
   display: grid;
   min-width: 0;
+  min-height: 0;
   grid-template-rows: 64px minmax(0, 1fr);
+  overflow: hidden;
 }
 
 .admin-topbar {
@@ -205,6 +211,7 @@ button:disabled {
 
 .admin-content {
   min-width: 0;
+  min-height: 0;
   padding: 24px;
   overflow: auto;
 }
diff --git a/apps/admin-web/src/styles/admin.test.ts b/apps/admin-web/src/styles/admin.test.ts
new file mode 100644
index 000000000..a03443925
--- /dev/null
+++ b/apps/admin-web/src/styles/admin.test.ts
@@ -0,0 +1,33 @@
+import fs from 'node:fs';
+import path from 'node:path';
+
+import { describe, expect, test } from 'vitest';
+
+const stylesheet = fs.readFileSync(
+  path.resolve(process.cwd(), 'apps/admin-web/src/styles/admin.css'),
+  'utf8',
+);
+
+describe('admin shell scrolling contract', () => {
+  test('desktop shell keeps sidebar separate from the scrollable content', () => {
+    expect(ruleFor('.admin-shell')).toContain('\n  height: 100dvh;');
+    expect(ruleFor('.admin-shell')).toContain('overflow: hidden');
+    expect(ruleFor('.admin-sidebar')).toContain('min-height: 0');
+    expect(ruleFor('.admin-sidebar')).toContain('overflow-y: auto');
+    expect(ruleFor('.admin-main')).toContain('min-height: 0');
+    expect(ruleFor('.admin-main')).toContain('overflow: hidden');
+    expect(ruleFor('.admin-content')).toContain('min-height: 0');
+    expect(ruleFor('.admin-content')).toContain('overflow: auto');
+  });
+});
+
+function ruleFor(selector: string) {
+  const escapedSelector = selector.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+  const match = stylesheet.match(
+    new RegExp(`${escapedSelector}\\s*\\{([^}]*)\\}`),
+  );
+  if (!match) {
+    throw new Error(`Missing CSS rule for ${selector}`);
+  }
+  return match[1];
+}
diff --git a/docs/project-memory/shared-memory/decision-log.md b/docs/project-memory/shared-memory/decision-log.md
index f5b1ca82a..c9d78e429 100644
--- a/docs/project-memory/shared-memory/decision-log.md
+++ b/docs/project-memory/shared-memory/decision-log.md
@@ -4022,3 +4022,17 @@
 - 生命周期：新维护窗口未提供 `--page-file` 时清理 marker 外残留公告；同一窗口内 Stdb / API 发布重复调用 `maintenance-on.sh` 时保留已安装公告；`maintenance-off.sh` 同时清理 marker 和公告页。Web Deploy 不再拥有临时公告事实源。
 - 影响范围：默认维护页、维护开关脚本、Nginx snippet、Pingora 配置与 smoke、生产 Web 发布包门禁和生产运维文档。
 - 验证方式：`npm run check:maintenance-page`、`npm run check:nginx-spa-routes`、`cargo test -p pingora-gateway --manifest-path server-rs/Cargo.toml`、`npm run check:pingora-gateway-smoke`、`npm run check:production-ops`、`npm run check:encoding`、`git diff --check`。
+
+## 2026-07-13 兑换码生效日期范围对齐邀请码
+
+- 背景：后台邀请码已支持可选开始时间和截止时间，但兑换码只有启用状态，运营无法预设活动时间窗口，用户兑换也没有后端时间边界校验。
+- 决策：`profile_redeem_code` 在已有字段末尾追加可空 `starts_at` / `expires_at`，默认均为空；后台请求和响应使用可空 `startsAt` / `expiresAt`。时间窗口与邀请码一致：空边界合法，双边界必须严格满足开始早于截止，有效区间为 `[starts_at, expires_at)`。
+- 兑换边界：时间是后端事实，`redeem_profile_reward_code` 必须用经后端构造的 `redeemed_at_micros` 拒绝未生效或已过期的兑换码；前端的状态标签只用于运营展示，不代替后端校验。
+- 影响范围：`module-runtime` 兑换码命令与校验、`spacetime-module` schema / migration / procedure、生成 bindings、`spacetime-client`、`shared-contracts` / `packages/shared`、`api-server` 和 `apps/admin-web` 兑换码页。
+
+## 2026-07-13 后台侧边栏与主内容独立滚动
+
+- 背景：后台壳层只给 `.admin-shell` 设置 `min-height: 100dvh`，长页面会撑高 document；滚动时侧边栏与主内容一起移出视口，`.admin-content` 上的 `overflow: auto` 没有成为真正滚动容器。
+- 决策：后台壳层固定为 `height: 100dvh` 并隐藏壳层 overflow；桌面侧边栏使用独立 `overflow-y: auto`，`.admin-main` 通过 `min-height: 0` 和 `overflow: hidden` 约束网格，`.admin-content` 使用 `min-height: 0; overflow: auto` 独立滚动。
+- 响应式边界：小于等于 `980px` 时仍隐藏桌面侧边栏，主内容在视口高度内滚动，底部导航继续固定。
+- 验证方式：`apps/admin-web/src/styles/admin.test.ts` 锁定壳层滚动契约；桌面浏览器滚动后应保持 `window.scrollY = 0`、侧边栏 `top = 0`，只改变 `.admin-content.scrollTop`；移动视口继续由 `.admin-content` 滚动。
diff --git a/docs/【后端架构】server-rs与SpacetimeDB数据契约-2026-05-15.md b/docs/【后端架构】server-rs与SpacetimeDB数据契约-2026-05-15.md
index 42818aef7..5e5c68170 100644
--- a/docs/【后端架构】server-rs与SpacetimeDB数据契约-2026-05-15.md
+++ b/docs/【后端架构】server-rs与SpacetimeDB数据契约-2026-05-15.md
@@ -709,6 +709,7 @@ npm run check:server-rs-ddd
 
 - Rust 结构体：`ProfileInviteCode`
 - 源码：`server-rs/crates/spacetime-module/src/runtime/profile.rs`
+- 生效时间：`starts_at` / `expires_at` 均可为空；两者同时存在时必须满足 `starts_at < expires_at`。开始时刻计入有效区间，截止时刻不计入有效区间。
 
 ### `profile_code_operation`
 
@@ -756,6 +757,8 @@ npm run check:server-rs-ddd
 
 - Rust 结构体：`ProfileRedeemCode`
 - 源码：`server-rs/crates/spacetime-module/src/runtime/profile.rs`
+- 生效时间：复用邀请码时间窗口语义，`starts_at` / `expires_at` 均可为空；两者同时存在时必须满足 `starts_at < expires_at`。开始时刻计入有效区间，截止时刻不计入有效区间。用户兑换时以后端接收的 `redeemed_at_micros` 判定：未到开始时间拒绝为“兑换码未生效”，到达或超过截止时间拒绝为“兑换码已过期”。
+- 后台契约：`AdminUpsertProfileRedeemCodeRequest` 通过可空 `startsAt` / `expiresAt` 接收 RFC3339 时间，列表与保存响应同步返回这两个字段；后台页只负责输入、回填和显示，真正兑换判定留在后端事务路径。
 
 ### `profile_redeem_code_usage`
 
diff --git a/packages/shared/src/contracts/runtime.ts b/packages/shared/src/contracts/runtime.ts
index a01f70547..7f731aa9a 100644
--- a/packages/shared/src/contracts/runtime.ts
+++ b/packages/shared/src/contracts/runtime.ts
@@ -457,6 +457,8 @@ export type ProfileRedeemCodeAdminResponse = {
   globalUsedCount: number;
   enabled: boolean;
   allowedUserIds: string[];
+  startsAt?: string | null;
+  expiresAt?: string | null;
   createdBy: string;
   createdAt: string;
   updatedAt: string;
@@ -484,6 +486,8 @@ export type AdminUpsertProfileRedeemCodeRequest = {
   enabled?: boolean;
   allowedUserIds?: string[];
   allowedPublicUserCodes?: string[];
+  startsAt?: string | null;
+  expiresAt?: string | null;
 };
 
 export type AdminDisableProfileRedeemCodeRequest = {
diff --git a/server-rs/crates/api-server/src/runtime_profile.rs b/server-rs/crates/api-server/src/runtime_profile.rs
index 726d0f533..0d936e15e 100644
--- a/server-rs/crates/api-server/src/runtime_profile.rs
+++ b/server-rs/crates/api-server/src/runtime_profile.rs
@@ -1127,6 +1127,12 @@ pub async fn admin_upsert_profile_redeem_code(
             AppError::from_status(StatusCode::BAD_REQUEST).with_message(error),
         )
     })?;
+    let starts_at_micros =
+        parse_admin_profile_code_time_field("兑换码", "startsAt", payload.starts_at)
+            .map_err(|error| runtime_profile_error_response(&request_context, error))?;
+    let expires_at_micros =
+        parse_admin_profile_code_time_field("兑换码", "expiresAt", payload.expires_at)
+            .map_err(|error| runtime_profile_error_response(&request_context, error))?;
     let record = state
         .spacetime_client()
         .admin_upsert_profile_redeem_code(
@@ -1138,6 +1144,8 @@ pub async fn admin_upsert_profile_redeem_code(
             payload.enabled,
             payload.allowed_user_ids,
             payload.allowed_public_user_codes,
+            starts_at_micros,
+            expires_at_micros,
             updated_at_micros as i64,
         )
         .await
@@ -1223,10 +1231,12 @@ pub async fn admin_upsert_profile_invite_code(
 ) -> Result<Json<Value>, Response> {
     let metadata_json = normalize_admin_invite_code_metadata(payload.metadata)
         .map_err(|error| runtime_profile_error_response(&request_context, error))?;
-    let starts_at_micros = parse_admin_invite_code_time_field("startsAt", payload.starts_at)
-        .map_err(|error| runtime_profile_error_response(&request_context, error))?;
-    let expires_at_micros = parse_admin_invite_code_time_field("expiresAt", payload.expires_at)
-        .map_err(|error| runtime_profile_error_response(&request_context, error))?;
+    let starts_at_micros =
+        parse_admin_profile_code_time_field("邀请码", "startsAt", payload.starts_at)
+            .map_err(|error| runtime_profile_error_response(&request_context, error))?;
+    let expires_at_micros =
+        parse_admin_profile_code_time_field("邀请码", "expiresAt", payload.expires_at)
+            .map_err(|error| runtime_profile_error_response(&request_context, error))?;
     let updated_at_micros = OffsetDateTime::now_utc().unix_timestamp_nanos() / 1_000;
     let record = state
         .spacetime_client()
@@ -1294,15 +1304,40 @@ pub async fn get_profile_play_stats(
 }
 
 fn map_runtime_profile_client_error(error: SpacetimeClientError) -> AppError {
-    let (status, provider) = match error {
+    let is_redeem_code_domain_error = matches!(
+        &error,
+        SpacetimeClientError::Procedure(message)
+            if is_runtime_profile_redeem_code_domain_error(message)
+    );
+    let (status, provider) = match &error {
         SpacetimeClientError::Runtime(_) => (StatusCode::BAD_REQUEST, "runtime-profile"),
+        SpacetimeClientError::Procedure(_) if is_redeem_code_domain_error => {
+            (StatusCode::BAD_REQUEST, "runtime-profile")
+        }
         _ => (StatusCode::BAD_GATEWAY, "spacetimedb"),
     };
 
-    AppError::from_status(status).with_details(json!({
+    let app_error = AppError::from_status(status).with_details(json!({
         "provider": provider,
         "message": error.to_string(),
-    }))
+    }));
+    if is_redeem_code_domain_error {
+        return app_error.with_message(error.to_string());
+    }
+    app_error
+}
+
+fn is_runtime_profile_redeem_code_domain_error(message: &str) -> bool {
+    matches!(
+        message,
+        "兑换码不存在"
+            | "兑换码已停用"
+            | "兑换码未生效"
+            | "兑换码已过期"
+            | "兑换次数已用完"
+            | "该兑换码不适用于当前账号"
+            | "兑换码奖励无效"
+    )
 }
 
 fn runtime_profile_error_response(request_context: &RequestContext, error: AppError) -> Response {
@@ -2112,7 +2147,8 @@ fn normalize_admin_invite_code_metadata(metadata: Option<Value>) -> Result<Strin
     Ok(metadata_json)
 }
 
-fn parse_admin_invite_code_time_field(
+fn parse_admin_profile_code_time_field(
+    code_label: &'static str,
     field: &'static str,
     value: Option<String>,
 ) -> Result<Option<i64>, AppError> {
@@ -2126,7 +2162,7 @@ fn parse_admin_invite_code_time_field(
 
     let parsed = parse_rfc3339(value).map_err(|error| {
         AppError::from_status(StatusCode::BAD_REQUEST)
-            .with_message(format!("邀请码 {field} 必须是 RFC3339 时间字符串"))
+            .with_message(format!("{code_label} {field} 必须是 RFC3339 时间字符串"))
             .with_details(json!({ "field": field, "message": error }))
     })?;
 
@@ -2271,6 +2307,8 @@ fn build_profile_redeem_code_admin_response(
         created_by: record.created_by,
         created_at: record.created_at,
         updated_at: record.updated_at,
+        starts_at: record.starts_at,
+        expires_at: record.expires_at,
     }
 }
 
@@ -2305,9 +2343,67 @@ mod tests {
         calc_wechat_virtual_payment_user_signature_with_key,
         format_profile_wallet_ledger_source_type,
         is_wechat_profile_recharge_order_terminal_for_confirmation,
-        normalize_admin_invite_code_metadata, should_notify_virtual_payment_goods_delivery,
+        map_runtime_profile_client_error, normalize_admin_invite_code_metadata,
+        parse_admin_profile_code_time_field, should_notify_virtual_payment_goods_delivery,
     };
 
+    #[test]
+    fn redeem_code_domain_errors_map_to_client_errors_without_hiding_infrastructure_failures() {
+        for message in ["兑换码未生效", "兑换码已过期"] {
+            let error = map_runtime_profile_client_error(SpacetimeClientError::Procedure(
+                message.to_string(),
+            ));
+
+            assert_eq!(error.status_code(), StatusCode::BAD_REQUEST);
+            assert_eq!(error.code(), "BAD_REQUEST");
+            assert_eq!(error.message(), message);
+            assert_eq!(
+                error
+                    .details()
+                    .and_then(|details| details.get("provider"))
+                    .and_then(Value::as_str),
+                Some("runtime-profile")
+            );
+        }
+
+        let infrastructure_error = map_runtime_profile_client_error(
+            SpacetimeClientError::Procedure("No such procedure: redeem_profile_reward_code".into()),
+        );
+        assert_eq!(infrastructure_error.status_code(), StatusCode::BAD_GATEWAY);
+        assert_eq!(
+            infrastructure_error
+                .details()
+                .and_then(|details| details.get("provider"))
+                .and_then(Value::as_str),
+            Some("spacetimedb")
+        );
+    }
+
+    #[test]
+    fn admin_profile_code_time_parser_accepts_optional_rfc3339_values() {
+        assert_eq!(
+            parse_admin_profile_code_time_field("兑换码", "startsAt", None)
+                .expect("missing boundary should pass"),
+            None
+        );
+        assert_eq!(
+            parse_admin_profile_code_time_field(
+                "兑换码",
+                "startsAt",
+                Some("1970-01-01T00:00:01Z".to_string()),
+            )
+            .expect("RFC3339 boundary should pass"),
+            Some(1_000_000)
+        );
+        let error = parse_admin_profile_code_time_field(
+            "兑换码",
+            "startsAt",
+            Some("2026-07-13 00:00:00".to_string()),
+        )
+        .expect_err("non-RFC3339 boundary should fail");
+        assert!(error.message().contains("兑换码 startsAt"));
+    }
+
     use axum::{
         body::Body,
         http::{Request, StatusCode},
@@ -2317,6 +2413,7 @@ mod tests {
         AccessTokenClaims, AccessTokenClaimsInput, AuthProvider, BindingStatus, sign_access_token,
     };
     use serde_json::Value;
+    use spacetime_client::SpacetimeClientError;
     use std::time::Duration;
     use time::OffsetDateTime;
     use tower::ServiceExt;
diff --git a/server-rs/crates/module-runtime/src/application.rs b/server-rs/crates/module-runtime/src/application.rs
index a123970e4..fc804bc82 100644
--- a/server-rs/crates/module-runtime/src/application.rs
+++ b/server-rs/crates/module-runtime/src/application.rs
@@ -1723,6 +1723,10 @@ pub fn build_runtime_profile_redeem_code_record(
         created_at_micros: snapshot.created_at_micros,
         updated_at: format_utc_micros(snapshot.updated_at_micros),
         updated_at_micros: snapshot.updated_at_micros,
+        starts_at: snapshot.starts_at_micros.map(format_utc_micros),
+        starts_at_micros: snapshot.starts_at_micros,
+        expires_at: snapshot.expires_at_micros.map(format_utc_micros),
+        expires_at_micros: snapshot.expires_at_micros,
     }
 }
 
@@ -2040,6 +2044,7 @@ pub fn validate_runtime_profile_redeem_code_usage(
     code: &RuntimeProfileRedeemCodeSnapshot,
     user_id: &str,
     user_used_count: u32,
+    redeemed_at_micros: i64,
 ) -> Result<(), RuntimeProfileFieldError> {
     if !code.enabled {
         return Err(RuntimeProfileFieldError::RedeemCodeDisabled);
@@ -2047,6 +2052,11 @@ pub fn validate_runtime_profile_redeem_code_usage(
     if code.reward_points == 0 {
         return Err(RuntimeProfileFieldError::InvalidRedeemCodeReward);
     }
+    crate::commands::validate_runtime_profile_redeem_code_redeem_time(
+        code.starts_at_micros,
+        code.expires_at_micros,
+        redeemed_at_micros,
+    )?;
 
     match code.mode {
         RuntimeProfileRedeemCodeMode::Public if user_used_count >= code.max_uses => {
diff --git a/server-rs/crates/module-runtime/src/commands.rs b/server-rs/crates/module-runtime/src/commands.rs
index d5d866d88..6de8a1c63 100644
--- a/server-rs/crates/module-runtime/src/commands.rs
+++ b/server-rs/crates/module-runtime/src/commands.rs
@@ -593,6 +593,8 @@ pub fn build_runtime_profile_redeem_code_admin_upsert_input(
     enabled: bool,
     allowed_user_ids: Vec<String>,
     allowed_public_user_codes: Vec<String>,
+    starts_at_micros: Option<i64>,
+    expires_at_micros: Option<i64>,
     updated_at_micros: i64,
 ) -> Result<RuntimeProfileRedeemCodeAdminUpsertInput, RuntimeProfileFieldError> {
     let admin_user_id = normalize_runtime_profile_user_id(admin_user_id)?;
@@ -603,6 +605,7 @@ pub fn build_runtime_profile_redeem_code_admin_upsert_input(
     if max_uses == 0 {
         return Err(RuntimeProfileFieldError::InvalidRedeemCodeMaxUses);
     }
+    validate_runtime_profile_redeem_code_validity_window(starts_at_micros, expires_at_micros)?;
 
     Ok(RuntimeProfileRedeemCodeAdminUpsertInput {
         admin_user_id,
@@ -619,6 +622,8 @@ pub fn build_runtime_profile_redeem_code_admin_upsert_input(
             .into_iter()
             .filter_map(|value| normalize_optional_string(Some(value)))
             .collect(),
+        starts_at_micros,
+        expires_at_micros,
         updated_at_micros,
     })
 }
@@ -1047,14 +1052,53 @@ pub fn validate_runtime_profile_invite_code_validity_window(
     starts_at_micros: Option<i64>,
     expires_at_micros: Option<i64>,
 ) -> Result<(), RuntimeProfileFieldError> {
-    if matches!((starts_at_micros, expires_at_micros), (Some(starts_at), Some(expires_at)) if starts_at >= expires_at)
-    {
+    if is_invalid_runtime_profile_code_validity_window(starts_at_micros, expires_at_micros) {
         return Err(RuntimeProfileFieldError::InvalidInviteCodeValidityWindow);
     }
 
     Ok(())
 }
 
+pub fn validate_runtime_profile_redeem_code_validity_window(
+    starts_at_micros: Option<i64>,
+    expires_at_micros: Option<i64>,
+) -> Result<(), RuntimeProfileFieldError> {
+    if is_invalid_runtime_profile_code_validity_window(starts_at_micros, expires_at_micros) {
+        return Err(RuntimeProfileFieldError::InvalidRedeemCodeValidityWindow);
+    }
+
+    Ok(())
+}
+
+pub fn validate_runtime_profile_redeem_code_redeem_time(
+    starts_at_micros: Option<i64>,
+    expires_at_micros: Option<i64>,
+    now_micros: i64,
+) -> Result<(), RuntimeProfileFieldError> {
+    if starts_at_micros
+        .map(|starts_at| now_micros < starts_at)
+        .unwrap_or(false)
+    {
+        return Err(RuntimeProfileFieldError::RedeemCodeNotStarted);
+    }
+
+    if expires_at_micros
+        .map(|expires_at| now_micros >= expires_at)
+        .unwrap_or(false)
+    {
+        return Err(RuntimeProfileFieldError::RedeemCodeExpired);
+    }
+
+    Ok(())
+}
+
+fn is_invalid_runtime_profile_code_validity_window(
+    starts_at_micros: Option<i64>,
+    expires_at_micros: Option<i64>,
+) -> bool {
+    matches!((starts_at_micros, expires_at_micros), (Some(starts_at), Some(expires_at)) if starts_at >= expires_at)
+}
+
 pub fn resolve_runtime_profile_invite_code_status(
     starts_at_micros: Option<i64>,
     expires_at_micros: Option<i64>,
diff --git a/server-rs/crates/module-runtime/src/domain.rs b/server-rs/crates/module-runtime/src/domain.rs
index 215b80ea1..5be01a58a 100644
--- a/server-rs/crates/module-runtime/src/domain.rs
+++ b/server-rs/crates/module-runtime/src/domain.rs
@@ -1575,6 +1575,8 @@ pub struct RuntimeProfileRedeemCodeAdminUpsertInput {
     pub enabled: bool,
     pub allowed_user_ids: Vec<String>,
     pub allowed_public_user_codes: Vec<String>,
+    pub starts_at_micros: Option<i64>,
+    pub expires_at_micros: Option<i64>,
     pub updated_at_micros: i64,
 }
 
@@ -1605,6 +1607,8 @@ pub struct RuntimeProfileRedeemCodeSnapshot {
     pub created_by: String,
     pub created_at_micros: i64,
     pub updated_at_micros: i64,
+    pub starts_at_micros: Option<i64>,
+    pub expires_at_micros: Option<i64>,
 }
 
 #[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
@@ -2098,6 +2102,10 @@ pub struct RuntimeProfileRedeemCodeRecord {
     pub created_at_micros: i64,
     pub updated_at: String,
     pub updated_at_micros: i64,
+    pub starts_at: Option<String>,
+    pub starts_at_micros: Option<i64>,
+    pub expires_at: Option<String>,
+    pub expires_at_micros: Option<i64>,
 }
 
 #[derive(Clone, Debug, PartialEq)]
diff --git a/server-rs/crates/module-runtime/src/errors.rs b/server-rs/crates/module-runtime/src/errors.rs
index c98e43eb5..695f7f304 100644
--- a/server-rs/crates/module-runtime/src/errors.rs
+++ b/server-rs/crates/module-runtime/src/errors.rs
@@ -58,6 +58,9 @@ pub enum RuntimeProfileFieldError {
     RedeemCodeNotAllowedForUser,
     InvalidRedeemCodeReward,
     InvalidRedeemCodeMaxUses,
+    InvalidRedeemCodeValidityWindow,
+    RedeemCodeNotStarted,
+    RedeemCodeExpired,
     InvalidInviteCodeMetadata,
     InvalidUserTag,
     InvalidInviteCodeValidityWindow,
@@ -130,6 +133,9 @@ impl std::fmt::Display for RuntimeProfileFieldError {
             Self::RedeemCodeNotAllowedForUser => f.write_str("该兑换码不适用于当前账号"),
             Self::InvalidRedeemCodeReward => f.write_str("兑换码奖励无效"),
             Self::InvalidRedeemCodeMaxUses => f.write_str("兑换次数必须大于 0"),
+            Self::InvalidRedeemCodeValidityWindow => f.write_str("兑换码开始时间不能晚于截止时间"),
+            Self::RedeemCodeNotStarted => f.write_str("兑换码未生效"),
+            Self::RedeemCodeExpired => f.write_str("兑换码已过期"),
             Self::InvalidInviteCodeMetadata => {
                 f.write_str("邀请码 metadata 必须是合法 JSON object")
             }
diff --git a/server-rs/crates/module-runtime/src/lib.rs b/server-rs/crates/module-runtime/src/lib.rs
index 409bf2356..2def15c25 100644
--- a/server-rs/crates/module-runtime/src/lib.rs
+++ b/server-rs/crates/module-runtime/src/lib.rs
@@ -1265,12 +1265,14 @@ mod tests {
             created_by: "admin".to_string(),
             created_at_micros: 1,
             updated_at_micros: 1,
+            starts_at_micros: None,
+            expires_at_micros: None,
         };
 
-        validate_runtime_profile_redeem_code_usage(&base, "user-1", 1)
+        validate_runtime_profile_redeem_code_usage(&base, "user-1", 1, 1)
             .expect("public code under per-user limit should pass");
         assert_eq!(
-            validate_runtime_profile_redeem_code_usage(&base, "user-1", 2)
+            validate_runtime_profile_redeem_code_usage(&base, "user-1", 2, 1)
                 .expect_err("public code over per-user limit should fail"),
             RuntimeProfileFieldError::RedeemCodeUsesExhausted
         );
@@ -1280,10 +1282,10 @@ mod tests {
             global_used_count: 9,
             ..base.clone()
         };
-        validate_runtime_profile_redeem_code_usage(&unique, "user-1", 0)
+        validate_runtime_profile_redeem_code_usage(&unique, "user-1", 0, 1)
             .expect("unique code should allow a user that has not redeemed it");
         assert_eq!(
-            validate_runtime_profile_redeem_code_usage(&unique, "user-1", 1)
+            validate_runtime_profile_redeem_code_usage(&unique, "user-1", 1, 1)
                 .expect_err("unique code should reject the same user twice"),
             RuntimeProfileFieldError::RedeemCodeUsesExhausted
         );
@@ -1295,14 +1297,14 @@ mod tests {
             ..base.clone()
         };
         assert_eq!(
-            validate_runtime_profile_redeem_code_usage(&private, "user-1", 0)
+            validate_runtime_profile_redeem_code_usage(&private, "user-1", 0, 1)
                 .expect_err("private code should check allow list"),
             RuntimeProfileFieldError::RedeemCodeNotAllowedForUser
         );
-        validate_runtime_profile_redeem_code_usage(&private, "user-2", 0)
+        validate_runtime_profile_redeem_code_usage(&private, "user-2", 0, 1)
             .expect("private code should allow an allowed user that has not redeemed it");
         assert_eq!(
-            validate_runtime_profile_redeem_code_usage(&private, "user-2", 1)
+            validate_runtime_profile_redeem_code_usage(&private, "user-2", 1, 1)
                 .expect_err("private code should reject the same allowed user twice"),
             RuntimeProfileFieldError::RedeemCodeUsesExhausted
         );
@@ -1312,7 +1314,7 @@ mod tests {
             ..base
         };
         assert_eq!(
-            validate_runtime_profile_redeem_code_usage(&disabled, "user-1", 0)
+            validate_runtime_profile_redeem_code_usage(&disabled, "user-1", 0, 1)
                 .expect_err("disabled code should fail"),
             RuntimeProfileFieldError::RedeemCodeDisabled
         );
diff --git a/server-rs/crates/module-runtime/tests/redeem_code_validity.rs b/server-rs/crates/module-runtime/tests/redeem_code_validity.rs
new file mode 100644
index 000000000..a430e90ce
--- /dev/null
+++ b/server-rs/crates/module-runtime/tests/redeem_code_validity.rs
@@ -0,0 +1,89 @@
+use module_runtime::{
+    RuntimeProfileFieldError, RuntimeProfileRedeemCodeMode, RuntimeProfileRedeemCodeSnapshot,
+    build_runtime_profile_redeem_code_admin_upsert_input, build_runtime_profile_redeem_code_record,
+    validate_runtime_profile_redeem_code_usage,
+    validate_runtime_profile_redeem_code_validity_window,
+};
+
+#[test]
+fn redeem_code_validity_window_allows_open_ended_and_requires_strict_order() {
+    assert!(validate_runtime_profile_redeem_code_validity_window(None, None).is_ok());
+    assert!(validate_runtime_profile_redeem_code_validity_window(Some(10), None).is_ok());
+    assert!(validate_runtime_profile_redeem_code_validity_window(None, Some(10)).is_ok());
+    assert_eq!(
+        validate_runtime_profile_redeem_code_validity_window(Some(10), Some(10)),
+        Err(RuntimeProfileFieldError::InvalidRedeemCodeValidityWindow)
+    );
+    assert_eq!(
+        validate_runtime_profile_redeem_code_validity_window(Some(20), Some(10)),
+        Err(RuntimeProfileFieldError::InvalidRedeemCodeValidityWindow)
+    );
+}
+
+#[test]
+fn redeem_code_admin_upsert_carries_optional_validity_window() {
+    let input = build_runtime_profile_redeem_code_admin_upsert_input(
+        "admin-1".to_string(),
+        "GIFT".to_string(),
+        RuntimeProfileRedeemCodeMode::Public,
+        30,
+        1,
+        true,
+        Vec::new(),
+        Vec::new(),
+        Some(10),
+        Some(20),
+        5,
+    )
+    .expect("valid window should pass");
+
+    assert_eq!(input.starts_at_micros, Some(10));
+    assert_eq!(input.expires_at_micros, Some(20));
+}
+
+#[test]
+fn redeem_code_usage_uses_inclusive_start_and_exclusive_expire_boundary() {
+    let code = redeem_code_snapshot(Some(20), Some(30));
+
+    assert_eq!(
+        validate_runtime_profile_redeem_code_usage(&code, "user-1", 0, 19),
+        Err(RuntimeProfileFieldError::RedeemCodeNotStarted)
+    );
+    validate_runtime_profile_redeem_code_usage(&code, "user-1", 0, 20)
+        .expect("start boundary should be valid");
+    validate_runtime_profile_redeem_code_usage(&code, "user-1", 0, 29)
+        .expect("time before expire boundary should be valid");
+    assert_eq!(
+        validate_runtime_profile_redeem_code_usage(&code, "user-1", 0, 30),
+        Err(RuntimeProfileFieldError::RedeemCodeExpired)
+    );
+}
+
+#[test]
+fn redeem_code_record_formats_optional_validity_window() {
+    let record =
+        build_runtime_profile_redeem_code_record(redeem_code_snapshot(Some(0), Some(1_000_000)));
+
+    assert_eq!(record.starts_at.as_deref(), Some("1970-01-01T00:00:00Z"));
+    assert_eq!(record.expires_at.as_deref(), Some("1970-01-01T00:00:01Z"));
+}
+
+fn redeem_code_snapshot(
+    starts_at_micros: Option<i64>,
+    expires_at_micros: Option<i64>,
+) -> RuntimeProfileRedeemCodeSnapshot {
+    RuntimeProfileRedeemCodeSnapshot {
+        code: "GIFT".to_string(),
+        mode: RuntimeProfileRedeemCodeMode::Public,
+        reward_points: 30,
+        max_uses: 1,
+        global_used_count: 0,
+        enabled: true,
+        allowed_user_ids: Vec::new(),
+        created_by: "admin".to_string(),
+        created_at_micros: 1,
+        updated_at_micros: 1,
+        starts_at_micros,
+        expires_at_micros,
+    }
+}
diff --git a/server-rs/crates/shared-contracts/src/runtime.rs b/server-rs/crates/shared-contracts/src/runtime.rs
index 98674d92b..67afc5fa0 100644
--- a/server-rs/crates/shared-contracts/src/runtime.rs
+++ b/server-rs/crates/shared-contracts/src/runtime.rs
@@ -680,6 +680,10 @@ pub struct AdminUpsertProfileRedeemCodeRequest {
     pub allowed_user_ids: Vec<String>,
     #[serde(default)]
     pub allowed_public_user_codes: Vec<String>,
+    #[serde(default)]
+    pub starts_at: Option<String>,
+    #[serde(default)]
+    pub expires_at: Option<String>,
 }
 
 #[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
@@ -713,6 +717,8 @@ pub struct ProfileRedeemCodeAdminResponse {
     pub created_by: String,
     pub created_at: String,
     pub updated_at: String,
+    pub starts_at: Option<String>,
+    pub expires_at: Option<String>,
 }
 
 #[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
@@ -1219,6 +1225,39 @@ mod tests {
     use super::*;
     use serde_json::json;
 
+    #[test]
+    fn redeem_code_admin_contract_uses_optional_camel_case_validity_window() {
+        let request: AdminUpsertProfileRedeemCodeRequest = serde_json::from_value(json!({
+            "code": "GIFT",
+            "mode": "public",
+            "rewardPoints": 30,
+            "maxUses": 1,
+            "startsAt": "2026-07-13T00:00:00Z",
+            "expiresAt": null
+        }))
+        .expect("redeem code request should accept validity window");
+        assert_eq!(request.starts_at.as_deref(), Some("2026-07-13T00:00:00Z"));
+        assert_eq!(request.expires_at, None);
+
+        let response = ProfileRedeemCodeAdminResponse {
+            code: "GIFT".to_string(),
+            mode: "public".to_string(),
+            reward_points: 30,
+            max_uses: 1,
+            global_used_count: 0,
+            enabled: true,
+            allowed_user_ids: Vec::new(),
+            created_by: "admin".to_string(),
+            created_at: "2026-07-13T00:00:00Z".to_string(),
+            updated_at: "2026-07-13T00:00:00Z".to_string(),
+            starts_at: Some("2026-07-13T00:00:00Z".to_string()),
+            expires_at: None,
+        };
+        let payload = serde_json::to_value(response).expect("response should serialize");
+        assert_eq!(payload["startsAt"], json!("2026-07-13T00:00:00Z"));
+        assert_eq!(payload["expiresAt"], json!(null));
+    }
+
     fn empty_mud_point_balance() -> ProfileMudPointBalanceResponse {
         ProfileMudPointBalanceResponse {
             total_points: 0,
diff --git a/server-rs/crates/spacetime-client/src/mapper/runtime_profile.rs b/server-rs/crates/spacetime-client/src/mapper/runtime_profile.rs
index 74f898096..1294e945f 100644
--- a/server-rs/crates/spacetime-client/src/mapper/runtime_profile.rs
+++ b/server-rs/crates/spacetime-client/src/mapper/runtime_profile.rs
@@ -315,6 +315,8 @@ impl From<module_runtime::RuntimeProfileRedeemCodeAdminUpsertInput>
             enabled: input.enabled,
             allowed_user_ids: input.allowed_user_ids,
             allowed_public_user_codes: input.allowed_public_user_codes,
+            starts_at_micros: input.starts_at_micros,
+            expires_at_micros: input.expires_at_micros,
             updated_at_micros: input.updated_at_micros,
         }
     }
@@ -1286,6 +1288,8 @@ pub(crate) fn map_runtime_profile_redeem_code_snapshot(
         created_by: snapshot.created_by,
         created_at_micros: snapshot.created_at_micros,
         updated_at_micros: snapshot.updated_at_micros,
+        starts_at_micros: snapshot.starts_at_micros,
+        expires_at_micros: snapshot.expires_at_micros,
     }
 }
 
diff --git a/server-rs/crates/spacetime-client/src/module_bindings/profile_redeem_code_type.rs b/server-rs/crates/spacetime-client/src/module_bindings/profile_redeem_code_type.rs
index 9be48e6d9..a880d3ceb 100644
--- a/server-rs/crates/spacetime-client/src/module_bindings/profile_redeem_code_type.rs
+++ b/server-rs/crates/spacetime-client/src/module_bindings/profile_redeem_code_type.rs
@@ -19,6 +19,8 @@ pub struct ProfileRedeemCode {
     pub created_by: String,
     pub created_at: __sdk::Timestamp,
     pub updated_at: __sdk::Timestamp,
+    pub starts_at: Option<__sdk::Timestamp>,
+    pub expires_at: Option<__sdk::Timestamp>,
 }
 
 impl __sdk::InModule for ProfileRedeemCode {
@@ -39,6 +41,8 @@ pub struct ProfileRedeemCodeCols {
     pub created_by: __sdk::__query_builder::Col<ProfileRedeemCode, String>,
     pub created_at: __sdk::__query_builder::Col<ProfileRedeemCode, __sdk::Timestamp>,
     pub updated_at: __sdk::__query_builder::Col<ProfileRedeemCode, __sdk::Timestamp>,
+    pub starts_at: __sdk::__query_builder::Col<ProfileRedeemCode, Option<__sdk::Timestamp>>,
+    pub expires_at: __sdk::__query_builder::Col<ProfileRedeemCode, Option<__sdk::Timestamp>>,
 }
 
 impl __sdk::__query_builder::HasCols for ProfileRedeemCode {
@@ -55,6 +59,8 @@ impl __sdk::__query_builder::HasCols for ProfileRedeemCode {
             created_by: __sdk::__query_builder::Col::new(table_name, "created_by"),
             created_at: __sdk::__query_builder::Col::new(table_name, "created_at"),
             updated_at: __sdk::__query_builder::Col::new(table_name, "updated_at"),
+            starts_at: __sdk::__query_builder::Col::new(table_name, "starts_at"),
+            expires_at: __sdk::__query_builder::Col::new(table_name, "expires_at"),
         }
     }
 }
diff --git a/server-rs/crates/spacetime-client/src/module_bindings/runtime_profile_redeem_code_admin_upsert_input_type.rs b/server-rs/crates/spacetime-client/src/module_bindings/runtime_profile_redeem_code_admin_upsert_input_type.rs
index 5f18a8751..1baeb5cbe 100644
--- a/server-rs/crates/spacetime-client/src/module_bindings/runtime_profile_redeem_code_admin_upsert_input_type.rs
+++ b/server-rs/crates/spacetime-client/src/module_bindings/runtime_profile_redeem_code_admin_upsert_input_type.rs
@@ -17,6 +17,8 @@ pub struct RuntimeProfileRedeemCodeAdminUpsertInput {
     pub enabled: bool,
     pub allowed_user_ids: Vec<String>,
     pub allowed_public_user_codes: Vec<String>,
+    pub starts_at_micros: Option<i64>,
+    pub expires_at_micros: Option<i64>,
     pub updated_at_micros: i64,
 }
 
diff --git a/server-rs/crates/spacetime-client/src/module_bindings/runtime_profile_redeem_code_snapshot_type.rs b/server-rs/crates/spacetime-client/src/module_bindings/runtime_profile_redeem_code_snapshot_type.rs
index aea09f25b..3580d911a 100644
--- a/server-rs/crates/spacetime-client/src/module_bindings/runtime_profile_redeem_code_snapshot_type.rs
+++ b/server-rs/crates/spacetime-client/src/module_bindings/runtime_profile_redeem_code_snapshot_type.rs
@@ -19,6 +19,8 @@ pub struct RuntimeProfileRedeemCodeSnapshot {
     pub created_by: String,
     pub created_at_micros: i64,
     pub updated_at_micros: i64,
+    pub starts_at_micros: Option<i64>,
+    pub expires_at_micros: Option<i64>,
 }
 
 impl __sdk::InModule for RuntimeProfileRedeemCodeSnapshot {
diff --git a/server-rs/crates/spacetime-client/src/runtime.rs b/server-rs/crates/spacetime-client/src/runtime.rs
index 2b158c0f9..561bc8f31 100644
--- a/server-rs/crates/spacetime-client/src/runtime.rs
+++ b/server-rs/crates/spacetime-client/src/runtime.rs
@@ -1351,6 +1351,8 @@ impl SpacetimeClient {
         enabled: bool,
         allowed_user_ids: Vec<String>,
         allowed_public_user_codes: Vec<String>,
+        starts_at_micros: Option<i64>,
+        expires_at_micros: Option<i64>,
         updated_at_micros: i64,
     ) -> Result<RuntimeProfileRedeemCodeRecord, SpacetimeClientError> {
         let procedure_input = build_runtime_profile_redeem_code_admin_upsert_input(
@@ -1362,6 +1364,8 @@ impl SpacetimeClient {
             enabled,
             allowed_user_ids,
             allowed_public_user_codes,
+            starts_at_micros,
+            expires_at_micros,
             updated_at_micros,
         )
         .map_err(SpacetimeClientError::validation_failed)?
diff --git a/server-rs/crates/spacetime-module/src/migration.rs b/server-rs/crates/spacetime-module/src/migration.rs
index 0dc48da85..a61c395a6 100644
--- a/server-rs/crates/spacetime-module/src/migration.rs
+++ b/server-rs/crates/spacetime-module/src/migration.rs
@@ -1308,6 +1308,17 @@ fn normalize_migration_row(table_name: &str, value: &serde_json::Value) -> serde
                 .or_insert_with(|| serde_json::Value::String("{}".to_string()));
         }
     }
+    if table_name == "profile_redeem_code" {
+        if let Some(object) = next_value.as_object_mut() {
+            // 中文注释：兑换码生效时间晚于兑换码表加入，旧迁移包按无时间边界兼容。
+            object
+                .entry("starts_at".to_string())
+                .or_insert(serde_json::Value::Null);
+            object
+                .entry("expires_at".to_string())
+                .or_insert(serde_json::Value::Null);
+        }
+    }
     if table_name == "profile_recharge_order" {
         if let Some(object) = next_value.as_object_mut() {
             // 中文注释：真实微信支付接入后才有平台交易号，旧迁移包按未回填处理。
@@ -1616,6 +1627,17 @@ fn is_supported_migration_table(table_name: &str) -> bool {
 mod migration_bootstrap_secret_tests {
     use super::*;
 
+    #[test]
+    fn old_profile_redeem_code_rows_default_to_open_validity_window() {
+        let normalized = normalize_migration_row(
+            "profile_redeem_code",
+            &serde_json::json!({ "code": "GIFT" }),
+        );
+
+        assert_eq!(normalized["starts_at"], serde_json::Value::Null);
+        assert_eq!(normalized["expires_at"], serde_json::Value::Null);
+    }
+
     #[test]
     fn bootstrap_secret_sha256_is_stable_and_does_not_contain_plaintext() {
         let secret = "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef";
diff --git a/server-rs/crates/spacetime-module/src/runtime/profile.rs b/server-rs/crates/spacetime-module/src/runtime/profile.rs
index 7dd00c720..4146a9c44 100644
--- a/server-rs/crates/spacetime-module/src/runtime/profile.rs
+++ b/server-rs/crates/spacetime-module/src/runtime/profile.rs
@@ -202,6 +202,10 @@ pub struct ProfileRedeemCode {
     pub(crate) created_by: String,
     pub(crate) created_at: Timestamp,
     pub(crate) updated_at: Timestamp,
+    #[default(None::<Timestamp>)]
+    pub(crate) starts_at: Option<Timestamp>,
+    #[default(None::<Timestamp>)]
+    pub(crate) expires_at: Option<Timestamp>,
 }
 
 #[spacetimedb::table(
@@ -3753,6 +3757,7 @@ fn redeem_profile_reward_code_record(
         &build_profile_redeem_code_snapshot_from_row(&redeem_code),
         &user_id,
         user_used_count,
+        validated_input.redeemed_at_micros,
     )
     .map_err(|error| error.to_string())?;
 
@@ -3817,6 +3822,8 @@ fn admin_upsert_profile_redeem_code_record(
         input.enabled,
         input.allowed_user_ids,
         input.allowed_public_user_codes,
+        input.starts_at_micros,
+        input.expires_at_micros,
         input.updated_at_micros,
     )
     .map_err(|error| error.to_string())?;
@@ -3858,6 +3865,12 @@ fn admin_upsert_profile_redeem_code_record(
         created_by: validated_input.admin_user_id,
         created_at,
         updated_at,
+        starts_at: validated_input
+            .starts_at_micros
+            .map(Timestamp::from_micros_since_unix_epoch),
+        expires_at: validated_input
+            .expires_at_micros
+            .map(Timestamp::from_micros_since_unix_epoch),
     };
     let inserted = ctx.db.profile_redeem_code().insert(row);
     insert_profile_code_operation(
@@ -7193,6 +7206,12 @@ fn build_profile_redeem_code_snapshot_from_row(
         created_by: row.created_by.clone(),
         created_at_micros: row.created_at.to_micros_since_unix_epoch(),
         updated_at_micros: row.updated_at.to_micros_since_unix_epoch(),
+        starts_at_micros: row
+            .starts_at
+            .map(|value| value.to_micros_since_unix_epoch()),
+        expires_at_micros: row
+            .expires_at
+            .map(|value| value.to_micros_since_unix_epoch()),
     }
 }