diff --git a/app/components/malio/date/DateTime.test.ts b/app/components/malio/date/DateTime.test.ts
new file mode 100644
index 0000000..e78d29d
--- /dev/null
+++ b/app/components/malio/date/DateTime.test.ts
@@ -0,0 +1,120 @@
+import {afterEach, beforeEach, describe, expect, it, vi} from 'vitest'
+import {mount} from '@vue/test-utils'
+import type {DefineComponent} from 'vue'
+import DateTime_ from './DateTime.vue'
+
+type DateTimeProps = {
+  id?: string
+  name?: string
+  label?: string
+  modelValue?: string | null
+  placeholder?: string
+  required?: boolean
+  disabled?: boolean
+  readonly?: boolean
+  hint?: string
+  error?: string
+  success?: string
+  min?: string
+  max?: string
+  clearable?: boolean
+  inputClass?: string
+  labelClass?: string
+  groupClass?: string
+}
+
+const DateTimeForTest = DateTime_ as DefineComponent<DateTimeProps>
+const mountDateTime = (props: DateTimeProps = {}) =>
+  mount(DateTimeForTest, {props, attachTo: document.body})
+
+describe('MalioDateTime', () => {
+  beforeEach(() => {
+    vi.useFakeTimers()
+    vi.setSystemTime(new Date(2026, 4, 19)) // 19 mai 2026
+  })
+  afterEach(() => vi.useRealTimers())
+
+  describe('rendu', () => {
+    it('affiche le label et l\'icône calendrier', () => {
+      const wrapper = mountDateTime({label: 'Rendez-vous'})
+      expect(wrapper.get('label').text()).toBe('Rendez-vous')
+      expect(wrapper.find('[data-test="calendar-icon"]').exists()).toBe(true)
+    })
+
+    it('affiche la valeur formatée date + heure dans le champ', () => {
+      const wrapper = mountDateTime({modelValue: '2026-05-20T14:30:00'})
+      const input = wrapper.get('[data-test="date-input"]').element as HTMLInputElement
+      expect(input.value).toBe('20/05/2026 14:30')
+    })
+  })
+
+  describe('popover', () => {
+    it('ouvre la grille et l\'input heure au clic', async () => {
+      const wrapper = mountDateTime()
+      await wrapper.get('[data-test="date-input"]').trigger('click')
+      expect(wrapper.find('[data-test="month-grid"]').exists()).toBe(true)
+      expect(wrapper.find('[data-test="time-input"]').exists()).toBe(true)
+    })
+  })
+
+  describe('sélection', () => {
+    it('émet le jour à 00:00 et garde le popover ouvert', async () => {
+      const wrapper = mountDateTime()
+      await wrapper.get('[data-test="date-input"]').trigger('click')
+      await wrapper.get('[data-test="day"][data-iso="2026-05-19"]').trigger('click')
+      expect(wrapper.emitted('update:modelValue')?.at(-1)).toEqual(['2026-05-19T00:00:00'])
+      expect(wrapper.find('[data-test="popover"]').exists()).toBe(true)
+    })
+
+    it('applique l\'heure réglée avant le clic du jour', async () => {
+      const wrapper = mountDateTime()
+      await wrapper.get('[data-test="date-input"]').trigger('click')
+      await wrapper.get('[data-test="time-input"]').setValue('09:15')
+      // pas d'émission tant qu'aucun jour n'est choisi
+      expect(wrapper.emitted('update:modelValue')).toBeUndefined()
+      await wrapper.get('[data-test="day"][data-iso="2026-05-19"]').trigger('click')
+      expect(wrapper.emitted('update:modelValue')?.at(-1)).toEqual(['2026-05-19T09:15:00'])
+    })
+
+    it('met à jour l\'heure quand une date est déjà choisie', async () => {
+      const wrapper = mountDateTime({modelValue: '2026-05-20T14:30:00'})
+      await wrapper.get('[data-test="date-input"]').trigger('click')
+      await wrapper.get('[data-test="time-input"]').setValue('08:45')
+      expect(wrapper.emitted('update:modelValue')?.at(-1)).toEqual(['2026-05-20T08:45:00'])
+    })
+
+    it('initialise l\'input heure depuis la valeur', async () => {
+      const wrapper = mountDateTime({modelValue: '2026-05-20T14:30:00'})
+      await wrapper.get('[data-test="date-input"]').trigger('click')
+      const time = wrapper.get('[data-test="time-input"]').element as HTMLInputElement
+      expect(time.value).toBe('14:30')
+    })
+  })
+
+  describe('bornes min/max', () => {
+    it('désactive les jours hors bornes (datetime borné sur la date)', async () => {
+      const wrapper = mountDateTime({min: '2026-05-10T00:00:00', max: '2026-05-20T00:00:00'})
+      await wrapper.get('[data-test="date-input"]').trigger('click')
+      const outside = wrapper.get('[data-test="day"][data-iso="2026-05-05"]')
+      expect((outside.element as HTMLButtonElement).disabled).toBe(true)
+    })
+  })
+
+  describe('effacement', () => {
+    it('émet null au clic sur la croix', async () => {
+      const wrapper = mountDateTime({modelValue: '2026-05-20T14:30:00'})
+      await wrapper.get('[data-test="clear"]').trigger('click')
+      expect(wrapper.emitted('update:modelValue')?.at(-1)).toEqual([null])
+    })
+  })
+
+  describe('accessibilité', () => {
+    it('positionne aria-invalid et describedby sur erreur', () => {
+      const wrapper = mountDateTime({error: 'Date requise'})
+      const input = wrapper.get('[data-test="date-input"]')
+      expect(input.attributes('aria-invalid')).toBe('true')
+      expect(input.attributes('aria-describedby')).toBeTruthy()
+      expect(wrapper.text()).toContain('Date requise')
+    })
+  })
+})
diff --git a/app/components/malio/date/DateTime.vue b/app/components/malio/date/DateTime.vue
new file mode 100644
index 0000000..33703a4
--- /dev/null
+++ b/app/components/malio/date/DateTime.vue
@@ -0,0 +1,140 @@
+<template>
+  <CalendarField
+    :id="id"
+    :display-value="displayValue"
+    :sync-to="datePart"
+    :name="name"
+    :label="label"
+    :placeholder="placeholder"
+    :required="required"
+    :disabled="disabled"
+    :readonly="readonly"
+    :hint="hint"
+    :error="error"
+    :success="success"
+    :clearable="clearable"
+    :input-class="inputClass"
+    :label-class="labelClass"
+    :group-class="groupClass"
+    v-bind="$attrs"
+    @clear="onClear"
+  >
+    <template #default="{ currentMonth, currentYear }">
+      <MonthGrid
+        :month="currentMonth"
+        :year="currentYear"
+        :selected-date="datePart"
+        :min="min?.slice(0, 10)"
+        :max="max?.slice(0, 10)"
+        @select="onSelectDay"
+      />
+      <!-- Bloc heure intérimaire : input natif, isolé pour remplacement futur par le sélecteur dédié. -->
+      <div class="mt-[10px] flex items-center gap-2 border-t border-m-muted/30 pt-[10px]">
+        <label
+          :for="timeInputId"
+          class="text-sm font-medium text-m-muted"
+        >
+          Heure
+        </label>
+        <input
+          :id="timeInputId"
+          data-test="time-input"
+          type="time"
+          :value="timeValue"
+          class="rounded-md border border-m-muted bg-white px-2 py-1 text-base outline-none focus:border-m-primary"
+          @input="onTimeInput"
+        >
+      </div>
+    </template>
+  </CalendarField>
+</template>
+
+<script setup lang="ts">
+import {computed, ref, useId, watch} from 'vue'
+import CalendarField from './internal/CalendarField.vue'
+import MonthGrid from './internal/MonthGrid.vue'
+import {composeDateTime, formatIsoDateTimeToDisplay, isValidIsoDateTime, splitDateTime} from './composables/datetimeFormat'
+
+defineOptions({name: 'MalioDateTime', inheritAttrs: false})
+
+const props = withDefaults(
+  defineProps<{
+    id?: string
+    name?: string
+    label?: string
+    modelValue?: string | null
+    placeholder?: string
+    required?: boolean
+    disabled?: boolean
+    readonly?: boolean
+    hint?: string
+    error?: string
+    success?: string
+    min?: string
+    max?: string
+    clearable?: boolean
+    inputClass?: string
+    labelClass?: string
+    groupClass?: string
+  }>(),
+  {
+    id: '',
+    name: '',
+    label: '',
+    modelValue: undefined,
+    placeholder: 'JJ/MM/AAAA HH:MM',
+    required: false,
+    disabled: false,
+    readonly: false,
+    hint: '',
+    error: '',
+    success: '',
+    min: undefined,
+    max: undefined,
+    clearable: true,
+    inputClass: '',
+    labelClass: '',
+    groupClass: '',
+  },
+)
+
+const emit = defineEmits<{(e: 'update:modelValue', value: string | null): void}>()
+
+const generatedId = useId()
+const timeInputId = computed(() => `${props.id || `malio-datetime-${generatedId}`}-time`)
+
+// pendingTime : heure réglée avant qu'un jour ne soit choisi (sinon on ne peut pas émettre).
+const pendingTime = ref('')
+
+const parts = computed(() => splitDateTime(props.modelValue ?? null))
+const datePart = computed(() => parts.value.date)
+const displayValue = computed(() => formatIsoDateTimeToDisplay(props.modelValue ?? null))
+const timeValue = computed(() => parts.value.time || pendingTime.value)
+
+function onSelectDay(iso: string) {
+  const time = parts.value.time || pendingTime.value || '00:00'
+  emit('update:modelValue', composeDateTime(iso, time))
+}
+
+function onTimeInput(e: Event) {
+  const value = (e.target as HTMLInputElement).value
+  if (!value) return
+  if (datePart.value) {
+    emit('update:modelValue', composeDateTime(datePart.value, value))
+  }
+  else {
+    pendingTime.value = value
+  }
+}
+
+function onClear() {
+  pendingTime.value = ''
+  emit('update:modelValue', null)
+}
+
+watch(() => props.modelValue, (val) => {
+  if (val && !isValidIsoDateTime(val) && import.meta.dev) {
+    console.warn(`[MalioDateTime] modelValue invalide ignoré : "${val}"`)
+  }
+})
+</script>