diff --git a/client/src/i18n/locales/en-US.ts b/client/src/i18n/locales/en-US.ts
index fad1f80..d8e8d49 100644
--- a/client/src/i18n/locales/en-US.ts
+++ b/client/src/i18n/locales/en-US.ts
@@ -283,6 +283,7 @@ export default {
     departureDate: 'Departure date',
     roomRateNote: 'Room rate note',
     roomRateNotePlaceholder: 'e.g. including BF',
+    datePlaceholder: 'yyyy-mm-dd',
     extraBedRate: 'Extra bed rate',
     description: 'Description',
     roomType: 'Room type',
diff --git a/client/src/i18n/locales/th-TH.ts b/client/src/i18n/locales/th-TH.ts
index 24bebef..4321fa5 100644
--- a/client/src/i18n/locales/th-TH.ts
+++ b/client/src/i18n/locales/th-TH.ts
@@ -283,6 +283,7 @@ export default {
     departureDate: 'Departure Date',
     roomRateNote: 'Room Rate Note',
     roomRateNotePlaceholder: 'เช่น including BF',
+    datePlaceholder: 'yyyy-mm-dd',
     extraBedRate: 'Extra Bed Rate',
     description: 'Description',
     roomType: 'Room Type',
diff --git a/client/src/i18n/locales/zh-CN.ts b/client/src/i18n/locales/zh-CN.ts
index cb15082..53b9158 100644
--- a/client/src/i18n/locales/zh-CN.ts
+++ b/client/src/i18n/locales/zh-CN.ts
@@ -283,6 +283,7 @@ export default {
     departureDate: '离店日期（Departure Date）',
     roomRateNote: '房价备注（Room Rate Note）',
     roomRateNotePlaceholder: '例如 including BF',
+    datePlaceholder: '年-月-日',
     extraBedRate: '加床价格（Extra Bed Rate）',
     description: '费用描述（Description）',
     roomType: '房型（Room Type）',
diff --git a/client/src/tests/manualInvoiceView.spec.ts b/client/src/tests/manualInvoiceView.spec.ts
index 3def374..4c95079 100644
--- a/client/src/tests/manualInvoiceView.spec.ts
+++ b/client/src/tests/manualInvoiceView.spec.ts
@@ -1,5 +1,6 @@
 import { flushPromises, mount } from '@vue/test-utils'
 import { createPinia, setActivePinia } from 'pinia'
+import PrimeVue from 'primevue/config'
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 import { nextTick } from 'vue'
 import { createI18n } from 'vue-i18n'
@@ -89,7 +90,7 @@ function mountView(options: { timeZone?: string; extraHotels?: AuthHotelResult[]
 
   const wrapper = mount(ReservationManualInvoiceView, {
     global: {
-      plugins: [i18n, pinia],
+      plugins: [i18n, pinia, PrimeVue],
     },
   })
   return Object.assign(wrapper, {
@@ -120,6 +121,20 @@ describe('ReservationManualInvoiceView', () => {
   beforeEach(() => {
     vi.mocked(service.generateManualReservationInvoice).mockReset()
     sessionStorage.clear()
+    Object.defineProperty(window, 'matchMedia', {
+      configurable: true,
+      writable: true,
+      value: vi.fn().mockImplementation((query: string) => ({
+        matches: false,
+        media: query,
+        onchange: null,
+        addListener: vi.fn(),
+        removeListener: vi.fn(),
+        addEventListener: vi.fn(),
+        removeEventListener: vi.fn(),
+        dispatchEvent: vi.fn(),
+      })),
+    })
     Object.defineProperty(URL, 'createObjectURL', {
       configurable: true,
       value: vi.fn(() => 'blob:manual-invoice-pdf'),
@@ -135,6 +150,7 @@ describe('ReservationManualInvoiceView', () => {
     vi.useRealTimers()
     vi.unstubAllGlobals()
     vi.restoreAllMocks()
+    document.body.innerHTML = ''
     if (nativeCreateObjectURL) {
       Object.defineProperty(URL, 'createObjectURL', {
         configurable: true,
@@ -276,13 +292,26 @@ describe('ReservationManualInvoiceView', () => {
     expect(wrapper.text()).not.toContain('说明')
   })
 
-  it('passes current locale to native date inputs', () => {
+  it('uses localized DatePicker controls for date fields', async () => {
     const wrapper = mountView({ locale: 'th-TH' })
+    const arrivalDateInput = wrapper.find('[data-testid="booking-arrival-date"]')
 
-    expect(wrapper.find('[data-testid="document-booking-date"]').attributes('lang')).toBe('th-TH')
-    expect(wrapper.find('[data-testid="booking-arrival-date"]').attributes('lang')).toBe('th-TH')
-    expect(wrapper.find('[data-testid="booking-departure-date"]').attributes('lang')).toBe('th-TH')
-    expect(wrapper.find('[data-testid="document-due-date"]').attributes('lang')).toBe('th-TH')
+    expect(arrivalDateInput.attributes('type')).toBe('text')
+    expect(arrivalDateInput.attributes('placeholder')).toBe(thTH.manualInvoice.datePlaceholder)
+    expect(arrivalDateInput.attributes('lang')).toBe('th-TH')
+    expect(wrapper.find('[data-testid="document-booking-date"]').attributes('type')).toBe('text')
+    expect(wrapper.find('[data-testid="booking-departure-date"]').attributes('type')).toBe('text')
+    expect(wrapper.find('[data-testid="document-due-date"]').attributes('type')).toBe('text')
+
+    await arrivalDateInput.setValue('2026-07-17')
+    await arrivalDateInput.trigger('click')
+    await flushPromises()
+
+    const arrivalDatePanel = document.body.querySelector('[data-testid="booking-arrival-date-panel"]')
+
+    expect(wrapper.find('[data-testid="booking-arrival-date-panel"]').exists()).toBe(false)
+    expect(arrivalDatePanel?.textContent).toContain('กรกฎาคม')
+    expect(arrivalDatePanel?.textContent).not.toContain('2026年07月')
   })
 
   it('marks required fields and highlights empty inputs after submit', async () => {
diff --git a/client/src/views/reservation/ReservationManualInvoiceView.vue b/client/src/views/reservation/ReservationManualInvoiceView.vue
index 593568d..8578657 100644
--- a/client/src/views/reservation/ReservationManualInvoiceView.vue
+++ b/client/src/views/reservation/ReservationManualInvoiceView.vue
@@ -201,17 +201,23 @@
                 >Booking Date</label>
               </div>
               <div class="date-control">
-                <input
-                  id="invoice-booking-date"
-                  v-model="form.document.booking_date"
-                  data-testid="document-booking-date"
-                  type="date"
-                  :lang="locale"
-                  :class="validationClass('booking-date')"
-                  v-bind="validationAria('booking-date')"
+                <DatePicker
+                  v-model="documentBookingDateModel"
+                  input-id="invoice-booking-date"
+                  class="localized-date-picker"
+                  data-testid="document-booking-date-picker"
+                  date-format="yy-mm-dd"
+                  :placeholder="t('manualInvoice.datePlaceholder')"
+                  :input-class="validationClass('booking-date')"
+                  :pt="datePickerPt('document-booking-date', 'booking-date')"
+                  :invalid="Boolean(fieldError('booking-date'))"
+                  show-icon
+                  icon-display="input"
+                  append-to="body"
+                  panel-class="manual-invoice-datepicker-panel"
                   required
-                  @input="markDocumentDatesEdited"
-                >
+                  @update:model-value="markDocumentDatesEdited"
+                />
               </div>
               <p
                 v-if="fieldError('booking-date')"
@@ -268,16 +274,22 @@
                 >Arrival Date</label>
               </div>
               <div class="date-control">
-                <input
-                  id="invoice-arrival-date"
-                  v-model="form.booking.arrival_date"
-                  data-testid="booking-arrival-date"
-                  type="date"
-                  :lang="locale"
-                  :class="validationClass('arrival-date')"
-                  v-bind="validationAria('arrival-date')"
+                <DatePicker
+                  v-model="bookingArrivalDateModel"
+                  input-id="invoice-arrival-date"
+                  class="localized-date-picker"
+                  data-testid="booking-arrival-date-picker"
+                  date-format="yy-mm-dd"
+                  :placeholder="t('manualInvoice.datePlaceholder')"
+                  :input-class="validationClass('arrival-date')"
+                  :pt="datePickerPt('booking-arrival-date', 'arrival-date')"
+                  :invalid="Boolean(fieldError('arrival-date'))"
+                  show-icon
+                  icon-display="input"
+                  append-to="body"
+                  panel-class="manual-invoice-datepicker-panel"
                   required
-                >
+                />
               </div>
               <p
                 v-if="fieldError('arrival-date')"
@@ -297,16 +309,22 @@
                 >Departure Date</label>
               </div>
               <div class="date-control">
-                <input
-                  id="invoice-departure-date"
-                  v-model="form.booking.departure_date"
-                  data-testid="booking-departure-date"
-                  type="date"
-                  :lang="locale"
-                  :class="validationClass('departure-date')"
-                  v-bind="validationAria('departure-date')"
+                <DatePicker
+                  v-model="bookingDepartureDateModel"
+                  input-id="invoice-departure-date"
+                  class="localized-date-picker"
+                  data-testid="booking-departure-date-picker"
+                  date-format="yy-mm-dd"
+                  :placeholder="t('manualInvoice.datePlaceholder')"
+                  :input-class="validationClass('departure-date')"
+                  :pt="datePickerPt('booking-departure-date', 'departure-date')"
+                  :invalid="Boolean(fieldError('departure-date'))"
+                  show-icon
+                  icon-display="input"
+                  append-to="body"
+                  panel-class="manual-invoice-datepicker-panel"
                   required
-                >
+                />
               </div>
               <p
                 v-if="fieldError('departure-date')"
@@ -326,17 +344,23 @@
                 >Due Date</label>
               </div>
               <div class="date-control">
-                <input
-                  id="invoice-due-date"
-                  v-model="form.document.due_date"
-                  data-testid="document-due-date"
-                  type="date"
-                  :lang="locale"
-                  :class="validationClass('due-date')"
-                  v-bind="validationAria('due-date')"
+                <DatePicker
+                  v-model="documentDueDateModel"
+                  input-id="invoice-due-date"
+                  class="localized-date-picker"
+                  data-testid="document-due-date-picker"
+                  date-format="yy-mm-dd"
+                  :placeholder="t('manualInvoice.datePlaceholder')"
+                  :input-class="validationClass('due-date')"
+                  :pt="datePickerPt('document-due-date', 'due-date')"
+                  :invalid="Boolean(fieldError('due-date'))"
+                  show-icon
+                  icon-display="input"
+                  append-to="body"
+                  panel-class="manual-invoice-datepicker-panel"
                   required
-                  @input="markDocumentDatesEdited"
-                >
+                  @update:model-value="markDocumentDatesEdited"
+                />
               </div>
               <p
                 v-if="fieldError('due-date')"
@@ -788,6 +812,8 @@
 </template>
 
 <script setup lang="ts">
+import DatePicker from 'primevue/datepicker'
+import { usePrimeVue, type PrimeVueLocaleOptions } from 'primevue/config'
 import { computed, reactive, ref, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
 
@@ -807,6 +833,13 @@ const MANUAL_SELECTION = 'MANUAL'
 const VAT_RATE = 0.07
 const previewCurrency = 'THB'
 
+type ManualInvoiceDateLocale = 'zh-CN' | 'en-US' | 'th-TH'
+type ManualInvoiceDatePickerLocale = Pick<
+  PrimeVueLocaleOptions,
+  'fileSizeTypes' | 'dayNames' | 'dayNamesShort' | 'dayNamesMin' | 'monthNames' | 'monthNamesShort'
+> &
+  Partial<PrimeVueLocaleOptions>
+
 interface RecipientContactSeed {
   contact_id: string
   attention: string
@@ -923,6 +956,7 @@ const recipientCompanies: RecipientCompanySeed[] = [
 ]
 
 const { t, te, locale } = useI18n()
+const primeVue = usePrimeVue()
 const authStore = useAuthStore()
 let nextChargeId = 1
 const defaultDocumentDates = createDefaultDocumentDates(resolveHotelTimeZone())
@@ -971,6 +1005,121 @@ const primaryCharge = computed<ChargeForm>(() => form.charges[0] as ChargeForm)
 const sourceGroupName = computed(() => form.booking.group_name.trim() || '未填写')
 const downloadMessage = computed(() => (downloadMessageKey.value ? t(downloadMessageKey.value) : ''))
 const fieldErrors = computed<FieldErrorMap>(() => (validationAttempted.value ? collectFieldErrors() : {}))
+const documentBookingDateModel = createDatePickerModel(
+  () => form.document.booking_date,
+  (value) => {
+    form.document.booking_date = value
+    markDocumentDatesEdited()
+  },
+)
+const documentDueDateModel = createDatePickerModel(
+  () => form.document.due_date,
+  (value) => {
+    form.document.due_date = value
+    markDocumentDatesEdited()
+  },
+)
+const bookingArrivalDateModel = createDatePickerModel(
+  () => form.booking.arrival_date,
+  (value) => {
+    form.booking.arrival_date = value
+  },
+)
+const bookingDepartureDateModel = createDatePickerModel(
+  () => form.booking.departure_date,
+  (value) => {
+    form.booking.departure_date = value
+  },
+)
+
+const primeVueDatePickerLocales: Record<ManualInvoiceDateLocale, ManualInvoiceDatePickerLocale> = {
+  'zh-CN': {
+    fileSizeTypes: ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'],
+    dayNames: ['星期日', '星期一', '星期二', '星期三', '星期四', '星期五', '星期六'],
+    dayNamesShort: ['周日', '周一', '周二', '周三', '周四', '周五', '周六'],
+    dayNamesMin: ['日', '一', '二', '三', '四', '五', '六'],
+    monthNames: ['一月', '二月', '三月', '四月', '五月', '六月', '七月', '八月', '九月', '十月', '十一月', '十二月'],
+    monthNamesShort: ['1月', '2月', '3月', '4月', '5月', '6月', '7月', '8月', '9月', '10月', '11月', '12月'],
+    chooseDate: '选择日期',
+    chooseMonth: '选择月份',
+    chooseYear: '选择年份',
+    prevMonth: '上个月',
+    nextMonth: '下个月',
+    prevYear: '上一年',
+    nextYear: '下一年',
+    today: '今天',
+    clear: '清除',
+    firstDayOfWeek: 1,
+    showMonthAfterYear: true,
+    dateFormat: 'yy-mm-dd',
+  },
+  'en-US': {
+    fileSizeTypes: ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'],
+    dayNames: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
+    dayNamesShort: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
+    dayNamesMin: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
+    monthNames: [
+      'January',
+      'February',
+      'March',
+      'April',
+      'May',
+      'June',
+      'July',
+      'August',
+      'September',
+      'October',
+      'November',
+      'December',
+    ],
+    monthNamesShort: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
+    chooseDate: 'Choose date',
+    chooseMonth: 'Choose month',
+    chooseYear: 'Choose year',
+    prevMonth: 'Previous month',
+    nextMonth: 'Next month',
+    prevYear: 'Previous year',
+    nextYear: 'Next year',
+    today: 'Today',
+    clear: 'Clear',
+    firstDayOfWeek: 0,
+    showMonthAfterYear: false,
+    dateFormat: 'yy-mm-dd',
+  },
+  'th-TH': {
+    fileSizeTypes: ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'],
+    dayNames: ['วันอาทิตย์', 'วันจันทร์', 'วันอังคาร', 'วันพุธ', 'วันพฤหัสบดี', 'วันศุกร์', 'วันเสาร์'],
+    dayNamesShort: ['อา.', 'จ.', 'อ.', 'พ.', 'พฤ.', 'ศ.', 'ส.'],
+    dayNamesMin: ['อา.', 'จ.', 'อ.', 'พ.', 'พฤ.', 'ศ.', 'ส.'],
+    monthNames: [
+      'มกราคม',
+      'กุมภาพันธ์',
+      'มีนาคม',
+      'เมษายน',
+      'พฤษภาคม',
+      'มิถุนายน',
+      'กรกฎาคม',
+      'สิงหาคม',
+      'กันยายน',
+      'ตุลาคม',
+      'พฤศจิกายน',
+      'ธันวาคม',
+    ],
+    monthNamesShort: ['ม.ค.', 'ก.พ.', 'มี.ค.', 'เม.ย.', 'พ.ค.', 'มิ.ย.', 'ก.ค.', 'ส.ค.', 'ก.ย.', 'ต.ค.', 'พ.ย.', 'ธ.ค.'],
+    chooseDate: 'เลือกวันที่',
+    chooseMonth: 'เลือกเดือน',
+    chooseYear: 'เลือกปี',
+    prevMonth: 'เดือนก่อนหน้า',
+    nextMonth: 'เดือนถัดไป',
+    prevYear: 'ปีก่อนหน้า',
+    nextYear: 'ปีถัดไป',
+    today: 'วันนี้',
+    clear: 'ล้าง',
+    firstDayOfWeek: 1,
+    showMonthAfterYear: false,
+    dateFormat: 'yy-mm-dd',
+  },
+}
 
 const previewTotals = computed(() => {
   const total = form.charges.reduce((sum, charge) => sum + lineAmount(charge), 0)
@@ -990,6 +1139,14 @@ const alertTitle = computed(() => {
   return t('manualInvoice.validationTitle')
 })
 
+watch(
+  locale,
+  (nextLocale) => {
+    syncPrimeVueDatePickerLocale(nextLocale)
+  },
+  { immediate: true },
+)
+
 watch(
   () => form.recipient.company_code,
   (companyCode) => {
@@ -1309,6 +1466,37 @@ function validationAria(fieldKey: string): Record<string, string | undefined> {
   }
 }
 
+function datePickerPt(testId: string, fieldKey: string): Record<string, unknown> {
+  return {
+    pcInputText: {
+      root: {
+        'data-testid': testId,
+        lang: locale.value,
+        ...validationAria(fieldKey),
+      },
+    },
+    panel: {
+      lang: locale.value,
+      'data-testid': `${testId}-panel`,
+    },
+  }
+}
+
+function syncPrimeVueDatePickerLocale(nextLocale: string): void {
+  const supportedLocale = normalizeDateLocale(nextLocale)
+  primeVue.config.locale = {
+    ...(primeVue.config.locale ?? primeVueDatePickerLocales['en-US']),
+    ...primeVueDatePickerLocales[supportedLocale],
+  }
+}
+
+function normalizeDateLocale(nextLocale: string): ManualInvoiceDateLocale {
+  if (nextLocale === 'en-US' || nextLocale === 'th-TH') {
+    return nextLocale
+  }
+  return 'zh-CN'
+}
+
 function chargeFieldKey(index: number, fieldName: ChargeFieldName): string {
   return `charge-${index}-${fieldName}`
 }
@@ -1500,6 +1688,40 @@ function datePartsToInputValue(parts: Intl.DateTimeFormatPart[]): string {
   return `${year}-${month}-${day}`
 }
 
+function createDatePickerModel(readValue: () => string, writeValue: (value: string) => void) {
+  return computed<Date | null>({
+    get: () => parseInputDateValue(readValue()),
+    set: (value) => {
+      writeValue(formatDatePickerValue(value))
+    },
+  })
+}
+
+function parseInputDateValue(readValue: string): Date | null {
+  const match = /^(\d{4})-(\d{2})-(\d{2})$/.exec(readValue)
+  if (!match) {
+    return null
+  }
+  const year = Number(match[1])
+  const month = Number(match[2])
+  const day = Number(match[3])
+  const date = new Date(year, month - 1, day)
+  if (date.getFullYear() !== year || date.getMonth() !== month - 1 || date.getDate() !== day) {
+    return null
+  }
+  return date
+}
+
+function formatDatePickerValue(value: Date | null | undefined): string {
+  if (!(value instanceof Date) || Number.isNaN(value.getTime())) {
+    return ''
+  }
+  const year = value.getFullYear()
+  const month = String(value.getMonth() + 1).padStart(2, '0')
+  const day = String(value.getDate()).padStart(2, '0')
+  return `${year}-${month}-${day}`
+}
+
 function isRecord(value: unknown): value is Record<string, unknown> {
   return typeof value === 'object' && value !== null && !Array.isArray(value)
 }
@@ -1740,6 +1962,21 @@ function isRecord(value: unknown): value is Record<string, unknown> {
   min-width: 0;
 }
 
+.localized-date-picker {
+  display: block;
+  width: 100%;
+}
+
+.localized-date-picker :deep(.p-inputtext) {
+  width: 100%;
+  padding-right: 40px;
+}
+
+.localized-date-picker :deep(.p-datepicker-input-icon-container) {
+  right: 12px;
+  color: var(--th-color-navy-950);
+}
+
 .number-control {
   display: grid;
   grid-template-columns: minmax(0, 1fr) auto;
@@ -2177,3 +2414,11 @@ function isRecord(value: unknown): value is Record<string, unknown> {
   }
 }
 </style>
+
+<style>
+.manual-invoice-datepicker-panel {
+  z-index: 1200;
+  color: var(--th-color-navy-950);
+  font-family: inherit;
+}
+</style>