diff --git a/app/components/malio/time/composables/timeFormat.test.ts b/app/components/malio/time/composables/timeFormat.test.ts
new file mode 100644
index 0000000..3eea58e
--- /dev/null
+++ b/app/components/malio/time/composables/timeFormat.test.ts
@@ -0,0 +1,31 @@
+import {describe, expect, it} from 'vitest'
+import {clampHours, clampMinutes, formatTime, padSegment, parseTime} from './timeFormat'
+
+describe('timeFormat', () => {
+  it('parse une chaîne HH:MM valide', () => {
+    expect(parseTime('09:05')).toEqual({hours: 9, minutes: 5})
+  })
+
+  it('renvoie null pour vide ou invalide', () => {
+    expect(parseTime('')).toBeNull()
+    expect(parseTime(null)).toBeNull()
+    expect(parseTime('abc')).toBeNull()
+    expect(parseTime('12')).toBeNull()
+  })
+
+  it('clamp les valeurs hors bornes au parsing', () => {
+    expect(parseTime('99:88')).toEqual({hours: 23, minutes: 59})
+  })
+
+  it('formate avec zéro-padding', () => {
+    expect(formatTime(9, 5)).toBe('09:05')
+    expect(formatTime(0, 0)).toBe('00:00')
+  })
+
+  it('clamp et pad les helpers', () => {
+    expect(clampHours(30)).toBe(23)
+    expect(clampHours(-2)).toBe(0)
+    expect(clampMinutes(75)).toBe(59)
+    expect(padSegment(7)).toBe('07')
+  })
+})
diff --git a/app/components/malio/time/composables/timeFormat.ts b/app/components/malio/time/composables/timeFormat.ts
new file mode 100644
index 0000000..02221c2
--- /dev/null
+++ b/app/components/malio/time/composables/timeFormat.ts
@@ -0,0 +1,32 @@
+export interface TimeParts {
+  hours: number
+  minutes: number
+}
+
+export function clampHours(value: number): number {
+  if (Number.isNaN(value)) return 0
+  return Math.min(23, Math.max(0, Math.trunc(value)))
+}
+
+export function clampMinutes(value: number): number {
+  if (Number.isNaN(value)) return 0
+  return Math.min(59, Math.max(0, Math.trunc(value)))
+}
+
+export function padSegment(value: number): string {
+  return value.toString().padStart(2, '0')
+}
+
+export function parseTime(value: string | null | undefined): TimeParts | null {
+  if (!value) return null
+  const match = /^(\d{1,2}):(\d{1,2})$/.exec(value.trim())
+  if (!match) return null
+  return {
+    hours: clampHours(Number.parseInt(match[1], 10)),
+    minutes: clampMinutes(Number.parseInt(match[2], 10)),
+  }
+}
+
+export function formatTime(hours: number, minutes: number): string {
+  return `${padSegment(clampHours(hours))}:${padSegment(clampMinutes(minutes))}`
+}