diff --git a/frontend/src/lib/components/admin/ApprovalModal.svelte b/frontend/src/lib/components/admin/ApprovalModal.svelte
index b069a4b..d49316b 100644
--- a/frontend/src/lib/components/admin/ApprovalModal.svelte
+++ b/frontend/src/lib/components/admin/ApprovalModal.svelte
@@ -1,4 +1,5 @@
 <script lang="ts">
+	import { SvelteDate } from 'svelte/reactivity';
 	import { authStore } from '$lib/stores/auth.svelte';
 	import { toast } from 'svelte-sonner';
 	import * as Modal from '$lib/components/ui/dialog';
@@ -64,7 +65,7 @@
 
 	function getBookingDateTime(): string {
 		if (!booking?.start_time) return '';
-		const d = new Date(booking.start_time);
+		const d = new SvelteDate(booking.start_time);
 		return d.toLocaleDateString('en-GB', {
 			weekday: 'long',
 			day: 'numeric',
@@ -147,12 +148,12 @@
 	function findOldestBooking(): { id: string; isCurrent: boolean } | null {
 		if (overlappingBookings.length === 0) return null;
 
-		const currentCreatedAt = new Date(booking.created_at).getTime();
+		const currentCreatedAt = new SvelteDate(booking.created_at).getTime();
 		let oldestId = booking.id;
 		let oldestTime = currentCreatedAt;
 
 		for (const ob of overlappingBookings) {
-			const obTime = new Date(ob.created_at).getTime();
+			const obTime = new SvelteDate(ob.created_at).getTime();
 			if (obTime < oldestTime) {
 				oldestTime = obTime;
 				oldestId = ob.id;
@@ -402,7 +403,7 @@
 											{ob.user?.full_name || 'Unknown'}
 										</div>
 										<div class="text-xs text-gray-500">
-											{new Date(ob.start_time).toLocaleDateString('en-GB', {
+											{new SvelteDate(ob.start_time).toLocaleDateString('en-GB', {
 												weekday: 'short',
 												day: 'numeric',
 												month: 'short',
@@ -430,7 +431,7 @@
 											{ob.status}
 										</span>
 										<div class="mt-1 text-xs text-gray-400">
-											{new Date(ob.created_at).toLocaleDateString('en-GB', {
+											{new SvelteDate(ob.created_at).toLocaleDateString('en-GB', {
 												day: 'numeric',
 												month: 'short',
 												hour: 'numeric',
diff --git a/frontend/src/lib/components/admin/EditBookingModal.svelte b/frontend/src/lib/components/admin/EditBookingModal.svelte
index 8259833..b74eeb5 100644
--- a/frontend/src/lib/components/admin/EditBookingModal.svelte
+++ b/frontend/src/lib/components/admin/EditBookingModal.svelte
@@ -1,7 +1,8 @@
 <script lang="ts">
 	import { authStore } from '$lib/stores/auth.svelte';
-	import { SvelteDate } from 'svelte/reactivity';
-	import { toast } from 'svelte-sonner';
+import { SvelteDate } from 'svelte/reactivity';
+import { toast } from 'svelte-sonner';
+import { formatDuration } from '$lib/utils/format';
 	import * as Modal from '$lib/components/ui/dialog';
 	import * as AlertDialog from '$lib/components/ui/alert-dialog';
 	import { Button } from '$lib/components/ui/button';
@@ -274,10 +275,10 @@
 	let maxAvailableDuration = $derived.by(() => {
 		if (!booking?.start_time || !nextAppointmentStart) return null;
 
-		const bookingStart = new Date(booking.start_time).getTime();
+		const bookingStart = new SvelteDate(booking.start_time).getTime();
 		const currentDurationMs = totalDuration * 60 * 1000;
 		const bookingEnd = bookingStart + currentDurationMs;
-		const nextStart = new Date(nextAppointmentStart).getTime();
+		const nextStart = new SvelteDate(nextAppointmentStart).getTime();
 
 		const availableMs = nextStart - bookingEnd;
 		return Math.max(0, Math.floor(availableMs / (60 * 1000)));
@@ -474,7 +475,7 @@
 									<div class="flex-1">
 										<div class="font-medium">{service.service_name}</div>
 										<div class="mt-1 text-sm text-gray-600">
-											{service.override_duration_minutes ?? service.duration_minutes} min • £{(service.override_price ?? service.price ?? 0).toFixed(2)}
+											{formatDuration(service.override_duration_minutes ?? service.duration_minutes ?? 0)} • £{(service.override_price ?? service.price ?? 0).toFixed(2)}
 										</div>
 										{#if service.override_price !== undefined || service.override_duration_minutes !== undefined}
 											<div class="text-xs text-amber-600">Modified</div>
@@ -523,7 +524,7 @@
 						</div>
 
 						<div class="mt-3 flex items-center justify-between border-t border-gray-200 pt-3 text-sm">
-							<span class="text-gray-600">Total: {totalDuration} min</span>
+							<span class="text-gray-600">Total: {formatDuration(totalDuration)}</span>
 							<span class="font-semibold">£{totalPrice.toFixed(2)}</span>
 						</div>
 					{/if}
@@ -536,7 +537,7 @@
 							Payments ({booking.payments.length})
 						</h3>
 						<div class="space-y-2">
-							{#each booking.payments as payment (payment.id)}
+							{#each booking.payments as payment, index (index)}
 								<div class="flex items-center justify-between rounded-md border border-gray-300 bg-white p-3">
 									<div class="flex-1">
 										<div class="font-medium">
@@ -561,7 +562,7 @@
 											{/if}
 										</div>
 										<div class="mt-1 text-xs text-gray-400">
-											{new Date(payment.created_at).toLocaleDateString('en-GB', { day: 'numeric', month: 'short', year: 'numeric' })}
+											{new SvelteDate(payment.created_at).toLocaleDateString('en-GB', { day: 'numeric', month: 'short', year: 'numeric' })}
 										</div>
 									</div>
 									{#if payment.status === 'completed'}
diff --git a/frontend/src/lib/components/admin/EditRequestModal.svelte b/frontend/src/lib/components/admin/EditRequestModal.svelte
index cca4306..4096a08 100644
--- a/frontend/src/lib/components/admin/EditRequestModal.svelte
+++ b/frontend/src/lib/components/admin/EditRequestModal.svelte
@@ -1,4 +1,5 @@
 <script lang="ts">
+	import { SvelteDate } from 'svelte/reactivity';
 	import { authStore } from '$lib/stores/auth.svelte';
 	import { toast } from 'svelte-sonner';
 	import * as Modal from '$lib/components/ui/dialog';
@@ -51,7 +52,7 @@
 	let showDenyConfirm = $state(false);
 
 	function formatDateLine1(dateTimeString: string): string {
-		const d = new Date(dateTimeString);
+		const d = new SvelteDate(dateTimeString);
 		const dateStr = d.toLocaleDateString('en-GB', {
 			weekday: 'long',
 			day: 'numeric',
@@ -67,7 +68,7 @@
 	}
 
 	function formatDateLine2(dateTimeString: string, durationMinutes: number): string {
-		const d = new Date(dateTimeString);
+		const d = new SvelteDate(dateTimeString);
 		const endMinutes = d.getHours() * 60 + d.getMinutes() + durationMinutes;
 		const endH = Math.floor(endMinutes / 60);
 		const endM = endMinutes % 60;
@@ -248,7 +249,7 @@
 					<div>
 						<div class="mb-1 text-xs text-gray-500">Original</div>
 						<div class="space-y-2">
-							{#each editRequest.original.services as service}
+							{#each editRequest.original.services as service (service.id)}
 								{#if serviceDiff.removed.some((s) => s.id === service.id)}
 									<div class="flex items-start gap-2 rounded border border-red-200 bg-red-50 p-2">
 										<span class="mt-0.5 text-red-600 font-mono text-sm">−</span>
@@ -278,7 +279,7 @@
 					<div>
 						<div class="mb-1 text-xs text-gray-500">Proposed</div>
 						<div class="space-y-2">
-							{#each editRequest.proposed.services as service}
+							{#each editRequest.proposed.services as service (service.id)}
 								{#if serviceDiff.added.some((s) => s.id === service.id)}
 									<div class="flex items-start gap-2 rounded border border-emerald-200 bg-emerald-50 p-2">
 										<span class="mt-0.5 text-emerald-600 font-mono text-sm">+</span>
diff --git a/frontend/src/lib/components/admin/RescheduleModal.svelte b/frontend/src/lib/components/admin/RescheduleModal.svelte
index 3838ee8..43614ce 100644
--- a/frontend/src/lib/components/admin/RescheduleModal.svelte
+++ b/frontend/src/lib/components/admin/RescheduleModal.svelte
@@ -33,7 +33,7 @@
 
 	let saving = $state(false);
 	let placeholder = $state<CalendarDate>(
-		new CalendarDate(new Date().getFullYear(), new Date().getMonth() + 1, new Date().getDate())
+		new CalendarDate(new SvelteDate().getFullYear(), new SvelteDate().getMonth() + 1, new SvelteDate().getDate())
 	);
 	let selectedDate = $state<CalendarDate | undefined>(undefined);
 	let selectedTime = $state<string | null>(null);
@@ -237,7 +237,7 @@
 		loadingMonths = {};
 		loadingMonthKeys = new Set();
 		rescheduleAutoSelectDone = false;
-		placeholder = new CalendarDate(new Date().getFullYear(), new Date().getMonth() + 1, new Date().getDate());
+		placeholder = new CalendarDate(new SvelteDate().getFullYear(), new SvelteDate().getMonth() + 1, new SvelteDate().getDate());
 	}
 
 	async function reschedule() {