diff --git a/frontend/src/components/modals/PlannedDayModal.test.tsx b/frontend/src/components/modals/PlannedDayModal.test.tsx
index e5115ca..9458c9d 100644
--- a/frontend/src/components/modals/PlannedDayModal.test.tsx
+++ b/frontend/src/components/modals/PlannedDayModal.test.tsx
@@ -2,7 +2,7 @@ import { describe, it, expect, vi, beforeEach } from 'vitest'
 import { render, screen, waitFor } from '@testing-library/react'
 import userEvent from '@testing-library/user-event'
 import { PlannedDayModal } from './PlannedDayModal'
-import type { PlannedLeaveDay } from '@/types'
+import { makePlannedLeaveDay } from '@/../tests/fixtures'
 
 describe('PlannedDayModal', () => {
   const mockOnClose = vi.fn()
@@ -49,17 +49,10 @@ describe('PlannedDayModal', () => {
     })
 
     it('shows "Redigera planerad dag" title when editing existing day', () => {
-      const existingDay: PlannedLeaveDay = {
+      const existingDay = makePlannedLeaveDay({
         id: 'day-1',
-        workspaceId: 'ws-1',
-        childId: 'c-1',
         parentPersonalDataUuid: 'p1',
-        date: '2026-06-15',
-        dayType: 'vacation',
-        isDubbeldag: false,
-        createdAt: '2026-01-01T00:00:00Z',
-        updatedAt: '2026-01-01T00:00:00Z',
-      }
+      })
       render(<PlannedDayModal {...defaultProps} isOpen={true} existingDay={existingDay} />)
       expect(screen.getByTestId('modal-title')).toHaveTextContent('Redigera planerad dag')
     })
@@ -430,17 +423,10 @@ describe('PlannedDayModal', () => {
     })
 
     it('displays local error after delete failure', async () => {
-      const existingDay: PlannedLeaveDay = {
+      const existingDay = makePlannedLeaveDay({
         id: 'day-1',
-        workspaceId: 'ws-1',
-        childId: 'c-1',
         parentPersonalDataUuid: 'p1',
-        date: '2026-06-15',
-        dayType: 'vacation',
-        isDubbeldag: false,
-        createdAt: '2026-01-01T00:00:00Z',
-        updatedAt: '2026-01-01T00:00:00Z',
-      }
+      })
       mockOnDelete.mockRejectedValue(new Error('Delete failed'))
 
       // Mock the confirm dialog
@@ -464,17 +450,10 @@ describe('PlannedDayModal', () => {
     })
 
     it('displays a generic error message for non-Error thrown in delete', async () => {
-      const existingDay: PlannedLeaveDay = {
+      const existingDay = makePlannedLeaveDay({
         id: 'day-1',
-        workspaceId: 'ws-1',
-        childId: 'c-1',
         parentPersonalDataUuid: 'p1',
-        date: '2026-06-15',
-        dayType: 'vacation',
-        isDubbeldag: false,
-        createdAt: '2026-01-01T00:00:00Z',
-        updatedAt: '2026-01-01T00:00:00Z',
-      }
+      })
       mockOnDelete.mockRejectedValue('Some error')
       vi.spyOn(window, 'confirm').mockReturnValue(true)
 
@@ -521,17 +500,12 @@ describe('PlannedDayModal', () => {
 
   describe('existing day initialization', () => {
     it('initializes day type from existing day', async () => {
-      const existingDay: PlannedLeaveDay = {
+      const existingDay = makePlannedLeaveDay({
         id: 'day-1',
-        workspaceId: 'ws-1',
-        childId: 'c-1',
         parentPersonalDataUuid: 'p2',
-        date: '2026-06-15',
         dayType: 'sjukpenning',
         isDubbeldag: true,
-        createdAt: '2026-01-01T00:00:00Z',
-        updatedAt: '2026-01-01T00:00:00Z',
-      }
+      })
 
       render(
         <PlannedDayModal
@@ -552,17 +526,11 @@ describe('PlannedDayModal', () => {
     })
 
     it('initializes parent from existing day', async () => {
-      const existingDay: PlannedLeaveDay = {
+      const existingDay = makePlannedLeaveDay({
         id: 'day-1',
-        workspaceId: 'ws-1',
-        childId: 'c-1',
         parentPersonalDataUuid: 'p2',
-        date: '2026-06-15',
         dayType: 'sjukpenning',
-        isDubbeldag: false,
-        createdAt: '2026-01-01T00:00:00Z',
-        updatedAt: '2026-01-01T00:00:00Z',
-      }
+      })
 
       render(
         <PlannedDayModal
@@ -583,17 +551,10 @@ describe('PlannedDayModal', () => {
     })
 
     it('shows correct title when editing existing day', () => {
-      const existingDay: PlannedLeaveDay = {
+      const existingDay = makePlannedLeaveDay({
         id: 'day-1',
-        workspaceId: 'ws-1',
-        childId: 'c-1',
         parentPersonalDataUuid: 'p1',
-        date: '2026-06-15',
-        dayType: 'vacation',
-        isDubbeldag: false,
-        createdAt: '2026-01-01T00:00:00Z',
-        updatedAt: '2026-01-01T00:00:00Z',
-      }
+      })
 
       render(
         <PlannedDayModal
@@ -607,29 +568,17 @@ describe('PlannedDayModal', () => {
     })
 
     it('reinitializes when existingDay changes', async () => {
-      const firstDay: PlannedLeaveDay = {
+      const firstDay = makePlannedLeaveDay({
         id: 'day-1',
-        workspaceId: 'ws-1',
-        childId: 'c-1',
         parentPersonalDataUuid: 'p1',
-        date: '2026-06-15',
-        dayType: 'vacation',
-        isDubbeldag: false,
-        createdAt: '2026-01-01T00:00:00Z',
-        updatedAt: '2026-01-01T00:00:00Z',
-      }
+      })
 
-      const secondDay: PlannedLeaveDay = {
+      const secondDay = makePlannedLeaveDay({
         id: 'day-2',
-        workspaceId: 'ws-1',
-        childId: 'c-1',
         parentPersonalDataUuid: 'p1',
-        date: '2026-06-15',
         dayType: 'lagsta',
         isDubbeldag: true,
-        createdAt: '2026-01-01T00:00:00Z',
-        updatedAt: '2026-01-01T00:00:00Z',
-      }
+      })
 
       const { rerender } = render(
         <PlannedDayModal
@@ -709,17 +658,10 @@ describe('PlannedDayModal', () => {
 
   describe('delete button functionality', () => {
     it('does not render delete button when onDelete not provided', () => {
-      const existingDay: PlannedLeaveDay = {
+      const existingDay = makePlannedLeaveDay({
         id: 'day-1',
-        workspaceId: 'ws-1',
-        childId: 'c-1',
         parentPersonalDataUuid: 'p1',
-        date: '2026-06-15',
-        dayType: 'vacation',
-        isDubbeldag: false,
-        createdAt: '2026-01-01T00:00:00Z',
-        updatedAt: '2026-01-01T00:00:00Z',
-      }
+      })
 
       render(
         <PlannedDayModal
@@ -733,17 +675,10 @@ describe('PlannedDayModal', () => {
     })
 
     it('does not render delete button in range mode', () => {
-      const existingDay: PlannedLeaveDay = {
+      const existingDay = makePlannedLeaveDay({
         id: 'day-1',
-        workspaceId: 'ws-1',
-        childId: 'c-1',
         parentPersonalDataUuid: 'p1',
-        date: '2026-06-15',
-        dayType: 'vacation',
-        isDubbeldag: false,
-        createdAt: '2026-01-01T00:00:00Z',
-        updatedAt: '2026-01-01T00:00:00Z',
-      }
+      })
 
       render(
         <PlannedDayModal
@@ -759,17 +694,10 @@ describe('PlannedDayModal', () => {
     })
 
     it('renders delete button when editing existing day with delete handler', () => {
-      const existingDay: PlannedLeaveDay = {
+      const existingDay = makePlannedLeaveDay({
         id: 'day-1',
-        workspaceId: 'ws-1',
-        childId: 'c-1',
         parentPersonalDataUuid: 'p1',
-        date: '2026-06-15',
-        dayType: 'vacation',
-        isDubbeldag: false,
-        createdAt: '2026-01-01T00:00:00Z',
-        updatedAt: '2026-01-01T00:00:00Z',
-      }
+      })
 
       render(
         <PlannedDayModal
@@ -784,17 +712,10 @@ describe('PlannedDayModal', () => {
     })
 
     it('shows confirmation dialog before deleting', async () => {
-      const existingDay: PlannedLeaveDay = {
+      const existingDay = makePlannedLeaveDay({
         id: 'day-1',
-        workspaceId: 'ws-1',
-        childId: 'c-1',
         parentPersonalDataUuid: 'p1',
-        date: '2026-06-15',
-        dayType: 'vacation',
-        isDubbeldag: false,
-        createdAt: '2026-01-01T00:00:00Z',
-        updatedAt: '2026-01-01T00:00:00Z',
-      }
+      })
 
       const confirmSpy = vi.spyOn(window, 'confirm').mockReturnValue(true)
       mockOnDelete.mockResolvedValue(undefined)
@@ -816,17 +737,10 @@ describe('PlannedDayModal', () => {
     })
 
     it('does not call onDelete if confirmation is cancelled', async () => {
-      const existingDay: PlannedLeaveDay = {
+      const existingDay = makePlannedLeaveDay({
         id: 'day-1',
-        workspaceId: 'ws-1',
-        childId: 'c-1',
         parentPersonalDataUuid: 'p1',
-        date: '2026-06-15',
-        dayType: 'vacation',
-        isDubbeldag: false,
-        createdAt: '2026-01-01T00:00:00Z',
-        updatedAt: '2026-01-01T00:00:00Z',
-      }
+      })
 
       const confirmSpy = vi.spyOn(window, 'confirm').mockReturnValue(false)
       mockOnDelete.mockResolvedValue(undefined)
@@ -848,17 +762,10 @@ describe('PlannedDayModal', () => {
     })
 
     it('calls onDelete if confirmation is accepted', async () => {
-      const existingDay: PlannedLeaveDay = {
+      const existingDay = makePlannedLeaveDay({
         id: 'day-1',
-        workspaceId: 'ws-1',
-        childId: 'c-1',
         parentPersonalDataUuid: 'p1',
-        date: '2026-06-15',
-        dayType: 'vacation',
-        isDubbeldag: false,
-        createdAt: '2026-01-01T00:00:00Z',
-        updatedAt: '2026-01-01T00:00:00Z',
-      }
+      })
 
       const confirmSpy = vi.spyOn(window, 'confirm').mockReturnValue(true)
       mockOnDelete.mockResolvedValue(undefined)
@@ -882,17 +789,10 @@ describe('PlannedDayModal', () => {
     })
 
     it('disables delete button when saving', () => {
-      const existingDay: PlannedLeaveDay = {
+      const existingDay = makePlannedLeaveDay({
         id: 'day-1',
-        workspaceId: 'ws-1',
-        childId: 'c-1',
         parentPersonalDataUuid: 'p1',
-        date: '2026-06-15',
-        dayType: 'vacation',
-        isDubbeldag: false,
-        createdAt: '2026-01-01T00:00:00Z',
-        updatedAt: '2026-01-01T00:00:00Z',
-      }
+      })
 
       render(
         <PlannedDayModal
@@ -909,17 +809,10 @@ describe('PlannedDayModal', () => {
     })
 
     it('shows loading text on delete button when saving', () => {
-      const existingDay: PlannedLeaveDay = {
+      const existingDay = makePlannedLeaveDay({
         id: 'day-1',
-        workspaceId: 'ws-1',
-        childId: 'c-1',
         parentPersonalDataUuid: 'p1',
-        date: '2026-06-15',
-        dayType: 'vacation',
-        isDubbeldag: false,
-        createdAt: '2026-01-01T00:00:00Z',
-        updatedAt: '2026-01-01T00:00:00Z',
-      }
+      })
 
       render(
         <PlannedDayModal
diff --git a/frontend/src/pages/Calendar.test.tsx b/frontend/src/pages/Calendar.test.tsx
index 4681cac..15d79d8 100644
--- a/frontend/src/pages/Calendar.test.tsx
+++ b/frontend/src/pages/Calendar.test.tsx
@@ -10,6 +10,7 @@ import {
   makeCalendarDaysResult,
   makeDayOverridesResult,
   makeShowWeekNumbersTuple,
+  makePlannedLeaveDay,
 } from '../../tests/fixtures'
 import { makeCalendarDayEntry, makeCalendarWindow } from '../../tests/fixtures/calendar'
 
@@ -791,17 +792,11 @@ describe('Calendar', () => {
       vi.mocked(usePlannedDays).mockReturnValue(
         makePlannedDaysResult({
           data: [
-            {
+            makePlannedLeaveDay({
               id: 'pd-1',
-              workspaceId: 'ws-1',
-              childId: 'child-1',
               parentPersonalDataUuid: 'person-1',
               date: clickedDate,
-              dayType: 'vacation',
-              isDubbeldag: false,
-              createdAt: '2026-01-01',
-              updatedAt: '2026-01-01',
-            },
+            }),
           ],
         })
       )
diff --git a/frontend/src/pages/Dashboard.test.tsx b/frontend/src/pages/Dashboard.test.tsx
index bca59d1..c5a4740 100644
--- a/frontend/src/pages/Dashboard.test.tsx
+++ b/frontend/src/pages/Dashboard.test.tsx
@@ -13,6 +13,7 @@ import {
   makePlannedDaysResult,
   makeScraperFetchResult,
   makeWorkspaceMembersResult,
+  makePlannedLeaveDay,
 } from '../../tests/fixtures'
 
 vi.mock('@/hooks')
@@ -88,8 +89,8 @@ describe('Dashboard', () => {
     vi.mocked(hooks.usePlannedDays).mockReturnValue(
       makePlannedDaysResult({
         data: [
-          { id: '1', workspaceId: 'ws-1', childId: 'c-1', parentPersonalDataUuid: 'pd-1', date: '2026-06-15', dayType: 'vacation', isDubbeldag: false, createdAt: '', updatedAt: '' },
-          { id: '2', workspaceId: 'ws-1', childId: 'c-1', parentPersonalDataUuid: 'pd-1', date: '2026-06-16', dayType: 'sjukpenning', isDubbeldag: false, createdAt: '', updatedAt: '' },
+          makePlannedLeaveDay({ id: '1', date: '2026-06-15' }),
+          makePlannedLeaveDay({ id: '2', date: '2026-06-16', dayType: 'sjukpenning' }),
         ],
       })
     )
@@ -445,9 +446,9 @@ describe('Dashboard', () => {
     vi.mocked(hooks.usePlannedDays).mockReturnValue(
       makePlannedDaysResult({
         data: [
-          { id: '1', workspaceId: 'ws-1', childId: 'c-1', parentPersonalDataUuid: 'pd-1', date: '2026-06-15', dayType: 'vacation', isDubbeldag: false, createdAt: '', updatedAt: '' },
-          { id: '2', workspaceId: 'ws-1', childId: 'c-1', parentPersonalDataUuid: 'pd-1', date: '2026-06-16', dayType: 'sjukpenning', isDubbeldag: false, createdAt: '', updatedAt: '' },
-          { id: '3', workspaceId: 'ws-1', childId: 'c-1', parentPersonalDataUuid: 'pd-1', date: '2026-06-17', dayType: 'lagsta', isDubbeldag: false, createdAt: '', updatedAt: '' },
+          makePlannedLeaveDay({ id: '1', date: '2026-06-15' }),
+          makePlannedLeaveDay({ id: '2', date: '2026-06-16', dayType: 'sjukpenning' }),
+          makePlannedLeaveDay({ id: '3', date: '2026-06-17', dayType: 'lagsta' }),
         ],
       })
     )
diff --git a/frontend/src/types/entities.ts b/frontend/src/types/entities.ts
index 07a66ee..bdcef1b 100644
--- a/frontend/src/types/entities.ts
+++ b/frontend/src/types/entities.ts
@@ -105,13 +105,10 @@ export interface PlannedLeaveDay {
   dayType: 'sjukpenning' | 'lagsta' | 'vacation'
   isDubbeldag: boolean
   // Which `LeaveWish` produced this day; null/omitted means ad-hoc (not tied to a wish).
-  // Optional (rather than required) so existing object literals elsewhere in the
-  // codebase that predate this field keep type-checking; `toPlannedLeaveDay` in
-  // services/api.ts always populates it from the wire response.
-  wishId?: string | null
+  // `toPlannedLeaveDay` in services/api.ts always populates it from the wire response.
+  wishId: string | null
   // True when the user hand-edited this day's type — the planner must not retype it.
-  // Optional for the same reason as `wishId` above.
-  isPinned?: boolean
+  isPinned: boolean
   createdAt: string
   updatedAt: string
 }