diff --git a/src/components/BatchAddDrawer.spec.ts b/src/components/BatchAddDrawer.spec.ts
index 84ee648..2862ce6 100644
--- a/src/components/BatchAddDrawer.spec.ts
+++ b/src/components/BatchAddDrawer.spec.ts
@@ -5,6 +5,7 @@ import { afterEach, describe, expect, it } from 'vitest'
 import { createMemoryTaskRepository } from '@/data/taskRepository'
 import { useTaskStore } from '@/stores/tasks'
 import { useToastStore } from '@/stores/toast'
+import { todayIso } from '@/utils/date'
 
 import BatchAddDrawer from './BatchAddDrawer.vue'
 
@@ -68,13 +69,16 @@ describe('BatchAddDrawer 提交', () => {
     expect(store.byColumn.todo.map((task) => task.title)).toEqual(['第一条', '第二条', '第三条'])
   })
 
-  it('目标列、优先级、截止日期与标签整批共用', async () => {
+  it('目标列、优先级、起始日期、截止日期与标签整批共用', async () => {
     const { store, wrapper } = setup()
     await wrapper.find('textarea').setValue('第一条\n第二条')
 
     await buttonByText(wrapper, '进行中')?.trigger('click')
     await buttonByText(wrapper, '高')?.trigger('click')
-    await wrapper.find('input[type="date"]').setValue('2026-10-20')
+    // 两个日期输入按出现顺序为：起始日期、截止日期；
+    // 每次赋值后 DOM 会被重渲染重建，必须重新查询再操作下一个
+    await wrapper.findAll('input[type="date"]')[0]?.setValue('2026-10-12')
+    await wrapper.findAll('input[type="date"]')[1]?.setValue('2026-10-20')
 
     const tagInput = wrapper.find('input[aria-label="添加标签"]')
     await tagInput.setValue('前端')
@@ -85,11 +89,21 @@ describe('BatchAddDrawer 提交', () => {
     const created = store.byColumn.doing
     expect(created.map((task) => task.title)).toEqual(['第一条', '第二条'])
     expect(created[0]?.priority).toBe(3)
+    expect(created[0]?.startDate).toBe('2026-10-12')
     expect(created[0]?.dueDate).toBe('2026-10-20')
     expect(created[0]?.tags).toEqual(['前端'])
     expect(created[1]?.tags).toEqual(['前端'])
   })
 
+  it('起始日期默认预填当天', async () => {
+    const { store, wrapper } = setup()
+    await wrapper.find('textarea').setValue('A')
+
+    await buttonByText(wrapper, '添加 1 个任务')?.trigger('click')
+
+    expect(store.tasks[0]?.startDate).toBe(todayIso())
+  })
+
   it('提交后请求关闭并提示数量', async () => {
     const { wrapper } = setup()
     await wrapper.find('textarea').setValue('A\nB')
diff --git a/src/components/BatchAddDrawer.vue b/src/components/BatchAddDrawer.vue
index 6987898..3d40789 100644
--- a/src/components/BatchAddDrawer.vue
+++ b/src/components/BatchAddDrawer.vue
@@ -5,7 +5,7 @@
  * 一行一条，整段粘贴即可录入一批 —— 从笔记、Markdown 清单、聊天记录里
  * 直接复制过来就能用，行首的「-」「1.」这类列表符号会被自动去掉。
  *
- * 目标列、优先级、标签、截止日期是这一批**共用**的属性：批量录入时逐个
+ * 目标列、优先级、标签、起始日期、截止日期是这一批**共用**的属性：批量录入时逐个
  * 任务调字段不现实，而「先统一建出来、再单独改个别任务」正是看板的用法。
  */
 
@@ -15,6 +15,7 @@ import { useTaskStore } from '@/stores/tasks'
 import { useToastStore } from '@/stores/toast'
 import { COLUMNS, PRIORITY_LABELS, type ColumnId, type Priority } from '@/types/task'
 import { parseTaskLines } from '@/utils/batch'
+import { todayIso } from '@/utils/date'
 
 import DatePicker from './DatePicker.vue'
 import SideDrawer from './SideDrawer.vue'
@@ -33,6 +34,7 @@ const text = ref('')
 const status = ref<ColumnId>('todo')
 const priority = ref<Priority>(2)
 const dueDate = ref<string | null>(null)
+const startDate = ref<string | null>(todayIso())
 const tags = ref<string[]>([])
 
 const titles = computed(() => parseTaskLines(text.value))
@@ -47,6 +49,8 @@ watch(
     status.value = 'todo'
     priority.value = 2
     dueDate.value = null
+    // 每批都从「今天开工」开始，与 store 的默认值保持一致
+    startDate.value = todayIso()
     tags.value = []
   },
 )
@@ -60,6 +64,7 @@ function submit(): void {
       status: status.value,
       priority: priority.value,
       dueDate: dueDate.value,
+      startDate: startDate.value,
       tags: [...tags.value],
     })),
   )
@@ -138,6 +143,11 @@ function submit(): void {
         </div>
       </fieldset>
 
+      <div class="flex flex-col gap-1.5">
+        <span class="text-sm font-medium text-slate-600 dark:text-zinc-400">起始日期</span>
+        <DatePicker v-model="startDate" />
+      </div>
+
       <div class="flex flex-col gap-1.5">
         <span class="text-sm font-medium text-slate-600 dark:text-zinc-400">截止日期</span>
         <DatePicker v-model="dueDate" />
diff --git a/src/components/BoardColumn.spec.ts b/src/components/BoardColumn.spec.ts
index 5907aeb..76e1851 100644
--- a/src/components/BoardColumn.spec.ts
+++ b/src/components/BoardColumn.spec.ts
@@ -38,6 +38,7 @@ function makeTask(overrides: Partial<Task> = {}): Task {
     priority: 2,
     tags: [],
     dueDate: null,
+    startDate: null,
     sortOrder: 1024,
     createdAt: '2026-10-18T00:00:00.000Z',
     updatedAt: '2026-10-18T00:00:00.000Z',
diff --git a/src/components/TaskCard.spec.ts b/src/components/TaskCard.spec.ts
index 0f13f7d..c7b8ac5 100644
--- a/src/components/TaskCard.spec.ts
+++ b/src/components/TaskCard.spec.ts
@@ -26,6 +26,7 @@ function makeTask(overrides: Partial<Task> = {}): Task {
     priority: 2,
     tags: [],
     dueDate: null,
+    startDate: null,
     sortOrder: 1024,
     createdAt: '2026-10-18T00:00:00.000Z',
     updatedAt: '2026-10-18T00:00:00.000Z',
@@ -131,6 +132,24 @@ describe('截止日期', () => {
   })
 })
 
+describe('起始日期', () => {
+  it('起始日期为当天时不显示「开始」', () => {
+    const wrapper = mountCard({ startDate: dayjs().format('YYYY-MM-DD') })
+    expect(wrapper.text()).not.toContain('开始')
+  })
+
+  it('起始日期不是当天时显示「M月D日 开始」', () => {
+    const startDate = dayjs().add(3, 'day').format('YYYY-MM-DD')
+    const wrapper = mountCard({ startDate })
+    expect(wrapper.text()).toContain('开始')
+    expect(wrapper.text()).toContain(dayjs(startDate).format('M月D日'))
+  })
+
+  it('未设置起始日期时不显示「开始」', () => {
+    expect(mountCard({ startDate: null }).text()).not.toContain('开始')
+  })
+})
+
 describe('已完成样式', () => {
   it('标题加删除线，但不再整卡降透明度', () => {
     const wrapper = mountCard({ status: 'done' })
diff --git a/src/components/TaskCard.vue b/src/components/TaskCard.vue
index fd31016..bb1f017 100644
--- a/src/components/TaskCard.vue
+++ b/src/components/TaskCard.vue
@@ -3,7 +3,13 @@ import { computed } from 'vue'
 
 import { useTagColorStore } from '@/stores/tagColors'
 import { PRIORITY_LABELS, type MoveDirection, type Task } from '@/types/task'
-import { formatCompactDate, formatDateTime, formatDueDateForTask, isOverdue } from '@/utils/date'
+import {
+  formatCompactDate,
+  formatDateTime,
+  formatDueDateForTask,
+  isOverdue,
+  todayIso,
+} from '@/utils/date'
 
 const MAX_VISIBLE_TAGS = 3
 
@@ -73,6 +79,19 @@ const dueLabel = computed(() =>
     ? formatDueDateForTask(props.task.dueDate, props.task.status, props.task.completedAt)
     : null,
 )
+/**
+ * 起始日期：只在「不是今天」时显示。
+ *
+ * 新建任务的起始日期默认就是当天，若照常展示，几乎每张卡片都会挂一条
+ * 相同的「M月D日 开始」，把标签和截止日期挤到第二行却提供不了新信息。
+ * 保留下来的是真正有排期差异的那些：提前排的、拖到未来开工的。
+ */
+const startLabel = computed(() => {
+  const startDate = props.task.startDate
+  if (!startDate || startDate === todayIso()) return null
+  const compact = formatCompactDate(startDate)
+  return compact ? `${compact} 开始` : null
+})
 const visibleTags = computed(() =>
   props.task.tags.slice(0, MAX_VISIBLE_TAGS).map((tag) => ({
     name: tag,
@@ -244,6 +263,14 @@ const priorityTextClass = computed(() => {
           {{ PRIORITY_LABELS[task.priority] }}
         </span>
 
+        <span
+          v-if="startLabel"
+          class="text-slate-500 dark:text-zinc-400"
+          :title="`开始于 ${props.task.startDate}`"
+        >
+          {{ startLabel }}
+        </span>
+
         <span
           v-if="dueLabel"
           :class="
diff --git a/src/components/TaskDetailDrawer.spec.ts b/src/components/TaskDetailDrawer.spec.ts
index a5d33d9..75deeb1 100644
--- a/src/components/TaskDetailDrawer.spec.ts
+++ b/src/components/TaskDetailDrawer.spec.ts
@@ -6,6 +6,7 @@ import { describe, expect, it } from 'vitest'
 import { createMemoryTaskRepository } from '@/data/taskRepository'
 import { useTaskStore } from '@/stores/tasks'
 import { useToastStore } from '@/stores/toast'
+import { todayIso } from '@/utils/date'
 
 import TaskDetailDrawer from './TaskDetailDrawer.vue'
 
@@ -50,9 +51,10 @@ describe('TaskDetailDrawer 回填', () => {
       '原描述',
     )
     expect(wrapper.text()).toContain('#设计')
-    expect((wrapper.find('input[type="date"]').element as HTMLInputElement).value).toBe(
-      '2026-12-01',
-    )
+    // 两个日期输入按出现顺序为：起始日期、截止日期；起始日期由 store 默认为当天
+    const dateInputs = wrapper.findAll('input[type="date"]')
+    expect((dateInputs[0]?.element as HTMLInputElement).value).toBe(todayIso())
+    expect((dateInputs[1]?.element as HTMLInputElement).value).toBe('2026-12-01')
   })
 
   it('回填当前优先级（低）', () => {
@@ -81,7 +83,10 @@ describe('TaskDetailDrawer 保存', () => {
     await wrapper.find('input[aria-label="标题"]').setValue('新标题')
     await wrapper.find('textarea[aria-label="描述"]').setValue('新描述')
     await buttonByText(wrapper, '高')?.trigger('click')
-    await wrapper.find('input[type="date"]').setValue('2026-11-11')
+    // 两个日期输入按出现顺序为：起始日期、截止日期；
+    // 每次赋值后 DOM 会被重渲染重建，必须重新查询再操作下一个
+    await wrapper.findAll('input[type="date"]')[0]?.setValue('2026-11-05')
+    await wrapper.findAll('input[type="date"]')[1]?.setValue('2026-11-11')
     await wrapper.find('input[aria-label="添加标签"]').setValue('前端')
     await wrapper.find('input[aria-label="添加标签"]').trigger('keydown', { key: 'Enter' })
     await buttonByText(wrapper, '保存')?.trigger('click')
@@ -90,6 +95,7 @@ describe('TaskDetailDrawer 保存', () => {
     expect(task?.title).toBe('新标题')
     expect(task?.description).toBe('新描述')
     expect(task?.priority).toBe(3)
+    expect(task?.startDate).toBe('2026-11-05')
     expect(task?.dueDate).toBe('2026-11-11')
     expect(task?.tags).toEqual(['设计', '前端'])
     expect(wrapper.emitted('close')).toHaveLength(1)
@@ -118,7 +124,9 @@ describe('TaskDetailDrawer 保存', () => {
 
   it('清空截止日期会写入 null', async () => {
     const { store, wrapper, taskId } = setup()
-    await buttonByText(wrapper, '清除')?.trigger('click')
+    // 起始日期与截止日期各有一个「清除」，按出现顺序取后者
+    const clearButtons = wrapper.findAll('button').filter((node) => node.text() === '清除')
+    await clearButtons[1]?.trigger('click')
     await buttonByText(wrapper, '保存')?.trigger('click')
     expect(store.tasks.find((item) => item.id === taskId)?.dueDate).toBeNull()
   })
diff --git a/src/components/TaskDetailDrawer.vue b/src/components/TaskDetailDrawer.vue
index 8061702..d7cbaea 100644
--- a/src/components/TaskDetailDrawer.vue
+++ b/src/components/TaskDetailDrawer.vue
@@ -24,6 +24,7 @@ const description = ref('')
 const status = ref<ColumnId>('todo')
 const priority = ref<Priority>(2)
 const dueDate = ref<string | null>(null)
+const startDate = ref<string | null>(null)
 const tags = ref<string[]>([])
 const titleError = ref<string | null>(null)
 
@@ -45,6 +46,7 @@ watch(
     status.value = task?.status ?? 'todo'
     priority.value = task?.priority ?? 2
     dueDate.value = task?.dueDate ?? null
+    startDate.value = task?.startDate ?? null
     tags.value = task ? [...task.tags] : []
     titleError.value = null
     confirmingClose.value = false
@@ -92,6 +94,7 @@ const dirty = computed(() => {
     status.value !== task.status ||
     priority.value !== task.priority ||
     dueDate.value !== task.dueDate ||
+    startDate.value !== task.startDate ||
     !sameTags(tags.value, task.tags)
   )
 })
@@ -126,6 +129,7 @@ function save(): void {
     status: status.value,
     priority: priority.value,
     dueDate: dueDate.value,
+    startDate: startDate.value,
     tags: [...tags.value],
   })
   emit('close')
@@ -239,6 +243,11 @@ function remove(): void {
         </div>
       </fieldset>
 
+      <div class="flex flex-col gap-1.5">
+        <span class="text-sm font-medium text-slate-600 dark:text-zinc-400">起始日期</span>
+        <DatePicker v-model="startDate" />
+      </div>
+
       <div class="flex flex-col gap-1.5">
         <span class="text-sm font-medium text-slate-600 dark:text-zinc-400">截止日期</span>
         <DatePicker v-model="dueDate" />
diff --git a/src/data/schema.spec.ts b/src/data/schema.spec.ts
index 9cc321d..682c89f 100644
--- a/src/data/schema.spec.ts
+++ b/src/data/schema.spec.ts
@@ -21,6 +21,7 @@ function validTask(overrides: Record<string, unknown> = {}): Record<string, unkn
     priority: 2,
     tags: ['设计'],
     dueDate: '2026-10-20',
+    startDate: null,
     sortOrder: 1024,
     createdAt: '2026-10-18T00:00:00.000Z',
     updatedAt: '2026-10-18T00:00:00.000Z',
@@ -97,6 +98,12 @@ describe('coerceTask', () => {
     expect(result?.sortOrder).toBe(0)
   })
 
+  it('合法 startDate 保留，非法 startDate 收敛为 null', () => {
+    expect(coerceTask(validTask({ startDate: '2026-10-01' }))?.startDate).toBe('2026-10-01')
+    expect(coerceTask(validTask({ startDate: '2026-02-31' }))?.startDate).toBeNull()
+    expect(coerceTask(validTask({ startDate: undefined }))?.startDate).toBeNull()
+  })
+
   it('tags 过滤掉非字符串与空白项', () => {
     const result = coerceTask(validTask({ tags: ['ok', 1, null, '  ', 'ok2'] }))
     expect(result?.tags).toEqual(['ok', 'ok2'])
@@ -265,17 +272,46 @@ describe('版本迁移', () => {
     expect(state.tasks[0]?.archivedAt).toBe('2026-01-03T00:00:00.000Z')
   })
 
-  it('v0/v1/v2 都能一路迁移到 v3', () => {
+  it('v3 数据迁移到 v4 时补上 startDate，其余字段不变', () => {
+    const v3 = JSON.stringify({
+      schemaVersion: 3,
+      tasks: [
+        {
+          id: 'legacy',
+          title: '旧任务',
+          status: 'todo',
+          priority: 2,
+          sortOrder: 1024,
+          createdAt: '2026-01-01T00:00:00.000Z',
+          updatedAt: '2026-01-01T00:00:00.000Z',
+          completedAt: null,
+          archivedAt: null,
+          deletedAt: null,
+        },
+      ],
+    })
+
+    const state = parsePersistedState(v3)
+
+    expect(state.schemaVersion).toBe(SCHEMA_VERSION)
+    expect(state.tasks[0]?.startDate).toBeNull()
+    expect(state.tasks[0]?.deletedAt).toBeNull()
+    expect(state.tasks[0]?.title).toBe('旧任务')
+  })
+
+  it('v0/v1/v2/v3 都能一路迁移到当前版本', () => {
     const builds = [
       () => ({ tasks: [{ id: 'a', title: 'A', status: 'todo', priority: 2 }] }),
       () => ({ schemaVersion: 1, tasks: [{ id: 'a', title: 'A', status: 'todo', priority: 2 }] }),
       () => ({ schemaVersion: 2, tasks: [{ id: 'a', title: 'A', status: 'todo', priority: 2 }] }),
+      () => ({ schemaVersion: 3, tasks: [{ id: 'a', title: 'A', status: 'todo', priority: 2 }] }),
     ]
 
     for (const build of builds) {
       const state = parsePersistedState(JSON.stringify(build()))
-      expect(state.schemaVersion).toBe(3)
+      expect(state.schemaVersion).toBe(SCHEMA_VERSION)
       expect(state.tasks[0]?.deletedAt).toBeNull()
+      expect(state.tasks[0]?.startDate).toBeNull()
     }
   })
 
diff --git a/src/data/schema.ts b/src/data/schema.ts
index 69da18a..53a0ae5 100644
--- a/src/data/schema.ts
+++ b/src/data/schema.ts
@@ -9,7 +9,7 @@
 
 import { isColumnId, isPriority, type Task } from '@/types/task'
 
-export const SCHEMA_VERSION = 3
+export const SCHEMA_VERSION = 4
 
 /** 主数据在 localStorage 中的键名 */
 export const STORAGE_KEY = 'kanban.tasks'
@@ -69,6 +69,7 @@ export function coerceTask(value: unknown): Task | null {
   const tags = rawTags.filter((tag): tag is string => typeof tag === 'string' && tag.trim() !== '')
 
   const dueDate = value.dueDate
+  const startDate = value.startDate
   const sortOrder = value.sortOrder
   const createdAt = readString(value, 'createdAt') ?? new Date().toISOString()
   const updatedAt = readString(value, 'updatedAt') ?? createdAt
@@ -85,6 +86,7 @@ export function coerceTask(value: unknown): Task | null {
     priority,
     tags,
     dueDate: isValidDateString(dueDate) ? dueDate : null,
+    startDate: isValidDateString(startDate) ? startDate : null,
     sortOrder: typeof sortOrder === 'number' && Number.isFinite(sortOrder) ? sortOrder : 0,
     createdAt,
     updatedAt,
@@ -117,6 +119,7 @@ type Migration = (state: PersistedState) => PersistedState
  * - v0：早期数据没有 schemaVersion 字段，任务结构与 v1 一致
  * - v1 -> v2：新增 archivedAt 字段（归档功能）
  * - v2 -> v3：新增 deletedAt 字段（回收站 / 软删除）
+ * - v3 -> v4：新增 startDate 字段（起始日期）
  * 未来新增字段时，在此登记 n -> n+1 的转换，并同步提升 SCHEMA_VERSION。
  */
 const MIGRATIONS: Record<number, Migration> = {
@@ -129,6 +132,10 @@ const MIGRATIONS: Record<number, Migration> = {
     schemaVersion: 3,
     tasks: state.tasks.map((task) => ({ ...task, deletedAt: null })),
   }),
+  3: (state) => ({
+    schemaVersion: 4,
+    tasks: state.tasks.map((task) => ({ ...task, startDate: null })),
+  }),
 }
 
 /**
diff --git a/src/data/snapshot.spec.ts b/src/data/snapshot.spec.ts
index a09e47d..a51859e 100644
--- a/src/data/snapshot.spec.ts
+++ b/src/data/snapshot.spec.ts
@@ -39,6 +39,7 @@ function makeTask(id: string): Task {
     priority: 2,
     tags: [],
     dueDate: null,
+    startDate: null,
     sortOrder: 1024,
     createdAt: '2026-10-18T00:00:00.000Z',
     updatedAt: '2026-10-18T00:00:00.000Z',
diff --git a/src/data/taskRepository.spec.ts b/src/data/taskRepository.spec.ts
index 4f30a2b..52bea23 100644
--- a/src/data/taskRepository.spec.ts
+++ b/src/data/taskRepository.spec.ts
@@ -38,6 +38,7 @@ function makeTask(overrides: Partial<Task> = {}): Task {
     priority: 2,
     tags: [],
     dueDate: null,
+    startDate: null,
     sortOrder: 1024,
     createdAt: '2026-10-18T00:00:00.000Z',
     updatedAt: '2026-10-18T00:00:00.000Z',
diff --git a/src/stores/tasks.spec.ts b/src/stores/tasks.spec.ts
index 2f0daa8..36c480a 100644
--- a/src/stores/tasks.spec.ts
+++ b/src/stores/tasks.spec.ts
@@ -3,6 +3,7 @@ import { describe, expect, it, vi } from 'vitest'
 
 import { createMemoryTaskRepository, type TaskRepository } from '@/data/taskRepository'
 import type { Task } from '@/types/task'
+import { todayIso } from '@/utils/date'
 
 import { useTagColorStore } from './tagColors'
 import { UNDO_LIMIT, useTaskStore } from './tasks'
@@ -33,6 +34,7 @@ describe('初始化', () => {
         priority: 3,
         tags: [],
         dueDate: null,
+        startDate: null,
         sortOrder: 1024,
         createdAt: '2026-10-18T00:00:00.000Z',
         updatedAt: '2026-10-18T00:00:00.000Z',
@@ -162,7 +164,14 @@ describe('批量创建', () => {
   it('每条任务可以带各自的列、优先级、标签与截止日期', () => {
     const store = freshStore()
     const created = store.createTasks([
-      { title: 'A', status: 'doing', priority: 3, tags: ['前端'], dueDate: '2026-10-20' },
+      {
+        title: 'A',
+        status: 'doing',
+        priority: 3,
+        tags: ['前端'],
+        dueDate: '2026-10-20',
+        startDate: '2026-10-12',
+      },
       { title: 'B', status: 'done' },
     ])
 
@@ -170,9 +179,21 @@ describe('批量创建', () => {
     expect(created[0]?.priority).toBe(3)
     expect(created[0]?.tags).toEqual(['前端'])
     expect(created[0]?.dueDate).toBe('2026-10-20')
+    expect(created[0]?.startDate).toBe('2026-10-12')
     expect(created[1]?.completedAt).not.toBeNull()
   })
 
+  it('起始日期默认为当天，显式传 null 时保持为空', () => {
+    const store = freshStore()
+    const created = store.createTasks([
+      { title: '未指定' },
+      { title: '显式清空', startDate: null },
+    ])
+
+    expect(created[0]?.startDate).toBe(todayIso())
+    expect(created[1]?.startDate).toBeNull()
+  })
+
   it('跨列批量时各列内部都保持输入顺序', () => {
     const store = freshStore()
     store.createTasks([
@@ -533,6 +554,7 @@ describe('导出与导入', () => {
         priority: 2,
         tags: [],
         dueDate: null,
+        startDate: null,
         sortOrder: 1024,
         createdAt: '2026-10-18T00:00:00.000Z',
         updatedAt: '2026-10-18T00:00:00.000Z',
@@ -691,6 +713,7 @@ function makePersistedTask(overrides: Partial<Task> = {}): Task {
     priority: 2,
     tags: [],
     dueDate: null,
+    startDate: null,
     sortOrder: 1024,
     createdAt: '2026-09-01T00:00:00.000Z',
     updatedAt: '2026-09-01T00:00:00.000Z',
@@ -938,6 +961,19 @@ describe('批量编辑', () => {
     expect(store.activeTasks.every((task) => task.dueDate === null)).toBe(true)
   })
 
+  it('批量设置与清除起始日期', () => {
+    const store = freshStore()
+    const a = store.createTask({ title: 'A' })
+    const b = store.createTask({ title: 'B' })
+    const ids = [a?.id ?? '', b?.id ?? '']
+
+    store.updateTasks(ids, { startDate: '2026-11-03' })
+    expect(store.activeTasks.every((task) => task.startDate === '2026-11-03')).toBe(true)
+
+    store.updateTasks(ids, { startDate: null })
+    expect(store.activeTasks.every((task) => task.startDate === null)).toBe(true)
+  })
+
   it('批量归档只处理未删除任务', () => {
     const store = freshStore()
     const a = store.createTask({ title: 'A', status: 'done' })
@@ -1279,6 +1315,7 @@ describe('撤销与重做', () => {
         priority: 2,
         tags: [],
         dueDate: null,
+        startDate: null,
         sortOrder: 1024,
         createdAt: longAgo,
         updatedAt: longAgo,
diff --git a/src/stores/tasks.ts b/src/stores/tasks.ts
index b78c48e..07dd89c 100644
--- a/src/stores/tasks.ts
+++ b/src/stores/tasks.ts
@@ -19,6 +19,7 @@ import {
   type TaskRepository,
 } from '@/data/taskRepository'
 import { COLUMN_IDS, DEFAULT_PRIORITY, type ColumnId, type Priority, type Task } from '@/types/task'
+import { todayIso } from '@/utils/date'
 import { createId } from '@/utils/id'
 import { mergeTasks as mergeTaskLists } from '@/utils/merge'
 import {
@@ -61,6 +62,8 @@ export interface CreateTaskInput {
   priority?: Priority
   tags?: string[]
   dueDate?: string | null
+  /** 不传则默认当天；显式传 null 表示不填起始日期 */
+  startDate?: string | null
   status?: ColumnId
 }
 
@@ -358,6 +361,8 @@ export const useTaskStore = defineStore('tasks', () => {
         priority: input.priority ?? DEFAULT_PRIORITY,
         tags: normalizeTags(input.tags ?? []),
         dueDate: input.dueDate ?? null,
+        // 起始日期默认当天：新建任务天然「今天开工」，用户显式清空时仍保持 null
+        startDate: input.startDate === undefined ? todayIso() : input.startDate,
         sortOrder: sortOrderForPosition(working[status], 0),
         createdAt: now,
         updatedAt: now,
@@ -431,6 +436,7 @@ export const useTaskStore = defineStore('tasks', () => {
       if (patch.status !== undefined) taskPatch.status = patch.status
       if (patch.priority !== undefined) taskPatch.priority = patch.priority
       if (patch.dueDate !== undefined) taskPatch.dueDate = patch.dueDate
+      if (patch.startDate !== undefined) taskPatch.startDate = patch.startDate
 
       if (patch.addTags !== undefined || patch.removeTags !== undefined) {
         const tags = tagsAfterBatchPatch(task.tags, patch)
diff --git a/src/types/task.ts b/src/types/task.ts
index 848e57b..ba345d5 100644
--- a/src/types/task.ts
+++ b/src/types/task.ts
@@ -28,6 +28,8 @@ export interface Task {
   tags: string[]
   /** 仅日期，格式 YYYY-MM-DD；无截止日期时为 null */
   dueDate: string | null
+  /** 仅日期，格式 YYYY-MM-DD；任务尚未排期时为 null */
+  startDate: string | null
   /** 同列内排序用的浮点数，采用相邻中点插入 */
   sortOrder: number
   createdAt: string
diff --git a/src/utils/activity.spec.ts b/src/utils/activity.spec.ts
index 3822b3f..70304c5 100644
--- a/src/utils/activity.spec.ts
+++ b/src/utils/activity.spec.ts
@@ -28,6 +28,7 @@ function makeTask(completedAt: string | null, overrides: Partial<Task> = {}): Ta
     priority: 2,
     tags: [],
     dueDate: null,
+    startDate: null,
     sortOrder: 1024,
     createdAt: '2026-10-01T00:00:00.000Z',
     updatedAt: '2026-10-01T00:00:00.000Z',
diff --git a/src/utils/archive.spec.ts b/src/utils/archive.spec.ts
index f425bb4..2d1a1ee 100644
--- a/src/utils/archive.spec.ts
+++ b/src/utils/archive.spec.ts
@@ -25,6 +25,7 @@ function makeTask(overrides: Partial<Task> = {}): Task {
     priority: 2,
     tags: [],
     dueDate: null,
+    startDate: null,
     sortOrder: 1024,
     createdAt: '2026-10-01T00:00:00.000Z',
     updatedAt: '2026-10-01T00:00:00.000Z',
diff --git a/src/utils/filter.spec.ts b/src/utils/filter.spec.ts
index 7d3a202..026dc82 100644
--- a/src/utils/filter.spec.ts
+++ b/src/utils/filter.spec.ts
@@ -14,6 +14,7 @@ function makeTask(overrides: Partial<Task> = {}): Task {
     priority: 2,
     tags: [],
     dueDate: null,
+    startDate: null,
     sortOrder: 1024,
     createdAt: '2026-10-18T00:00:00.000Z',
     updatedAt: '2026-10-18T00:00:00.000Z',
diff --git a/src/utils/merge.spec.ts b/src/utils/merge.spec.ts
index 8f7bd80..50f3402 100644
--- a/src/utils/merge.spec.ts
+++ b/src/utils/merge.spec.ts
@@ -13,6 +13,7 @@ function makeTask(overrides: Partial<Task> = {}): Task {
     priority: 2,
     tags: [],
     dueDate: null,
+    startDate: null,
     sortOrder: 1024,
     createdAt: '2026-10-01T00:00:00.000Z',
     updatedAt: '2026-10-01T00:00:00.000Z',
diff --git a/src/utils/sortOrder.spec.ts b/src/utils/sortOrder.spec.ts
index 488939a..5e1a5b3 100644
--- a/src/utils/sortOrder.spec.ts
+++ b/src/utils/sortOrder.spec.ts
@@ -27,6 +27,7 @@ function makeTask(overrides: Partial<Task> = {}): Task {
     priority: 2,
     tags: [],
     dueDate: null,
+    startDate: null,
     sortOrder: sequence * SORT_ORDER_STEP,
     createdAt: '2026-10-18T00:00:00.000Z',
     updatedAt: '2026-10-18T00:00:00.000Z',
diff --git a/src/utils/stats.spec.ts b/src/utils/stats.spec.ts
index 30457a0..fa7d6c4 100644
--- a/src/utils/stats.spec.ts
+++ b/src/utils/stats.spec.ts
@@ -22,6 +22,7 @@ function makeTask(overrides: Partial<Task> = {}): Task {
     priority: 2,
     tags: [],
     dueDate: null,
+    startDate: null,
     sortOrder: 1024,
     createdAt: '2026-10-01T00:00:00.000Z',
     updatedAt: '2026-10-01T00:00:00.000Z',
diff --git a/src/utils/tags.spec.ts b/src/utils/tags.spec.ts
index 484bafb..e14645a 100644
--- a/src/utils/tags.spec.ts
+++ b/src/utils/tags.spec.ts
@@ -13,6 +13,7 @@ function makeTask(id: string, tags: string[]): Task {
     priority: 2,
     tags,
     dueDate: null,
+    startDate: null,
     sortOrder: 1024,
     createdAt: '2026-10-01T00:00:00.000Z',
     updatedAt: '2026-10-01T00:00:00.000Z',
diff --git a/src/utils/taskPatch.spec.ts b/src/utils/taskPatch.spec.ts
index c87852e..d174a96 100644
--- a/src/utils/taskPatch.spec.ts
+++ b/src/utils/taskPatch.spec.ts
@@ -15,6 +15,7 @@ function makeTask(overrides: Partial<Task> = {}): Task {
     priority: 2,
     tags: ['设计'],
     dueDate: null,
+    startDate: null,
     sortOrder: 1024,
     createdAt: '2026-10-01T00:00:00.000Z',
     updatedAt: '2026-10-01T00:00:00.000Z',
diff --git a/src/utils/taskPatch.ts b/src/utils/taskPatch.ts
index cc0f3af..4f306ad 100644
--- a/src/utils/taskPatch.ts
+++ b/src/utils/taskPatch.ts
@@ -23,6 +23,8 @@ export interface BatchPatch {
   priority?: Priority
   /** null 表示清空截止日期 */
   dueDate?: string | null
+  /** null 表示清空起始日期 */
+  startDate?: string | null
   addTags?: readonly string[]
   removeTags?: readonly string[]
   /** true 归档，false 取消归档 */
@@ -78,6 +80,7 @@ export function isBatchPatchEmpty(patch: BatchPatch): boolean {
     patch.status === undefined &&
     patch.priority === undefined &&
     patch.dueDate === undefined &&
+    patch.startDate === undefined &&
     !patch.addTags?.length &&
     !patch.removeTags?.length &&
     patch.archived === undefined
diff --git a/src/utils/today.spec.ts b/src/utils/today.spec.ts
index 49fbe02..6fc18ba 100644
--- a/src/utils/today.spec.ts
+++ b/src/utils/today.spec.ts
@@ -15,6 +15,7 @@ function makeTask(overrides: Partial<Task> = {}): Task {
     priority: 2,
     tags: [],
     dueDate: null,
+    startDate: null,
     sortOrder: 1024,
     createdAt: '2026-10-01T00:00:00.000Z',
     updatedAt: '2026-10-01T00:00:00.000Z',
diff --git a/src/views/StatsView.spec.ts b/src/views/StatsView.spec.ts
index b3ac316..f1037e1 100644
--- a/src/views/StatsView.spec.ts
+++ b/src/views/StatsView.spec.ts
@@ -26,6 +26,7 @@ function makeTask(completedAt: string | null, overrides: Partial<Task> = {}): Ta
     priority: 2,
     tags: [],
     dueDate: null,
+    startDate: null,
     sortOrder: 1024,
     createdAt: '2026-10-01T00:00:00.000Z',
     updatedAt: '2026-10-01T00:00:00.000Z',