diff --git a/web/src/routes/week/+page.svelte b/web/src/routes/week/+page.svelte
index 95b839d..5e7f5bb 100644
--- a/web/src/routes/week/+page.svelte
+++ b/web/src/routes/week/+page.svelte
@@ -1,14 +1,15 @@
 <script lang="ts">
 	import { onMount } from 'svelte';
-	import { days, weeks, settings, type ClosedDay, type ClosedWeek, type Settings, ApiError } from '$lib/api/client';
+	import { entries, days, weeks, settings, type Entry, type ClosedDay, type ClosedWeek, type Settings, ApiError } from '$lib/api/client';
 	import {
 		currentWeekKey, weekDayKeys, formatDurationShort, formatDelta, todayKey, isWorkday
 	} from '$lib/utils';
 
 	let weekKey = $state(currentWeekKey());
 	let dayKeys = $derived(weekDayKeys(weekKey));
-	let closedDaysMap: Record<string, ClosedDay> = $state({});
-	let closedWeek: ClosedWeek | null = $state(null);
+	let closedDaysMap = $state<Record<string, ClosedDay>>({});
+	let daysWithEntries = $state<Set<string>>(new Set());
+	let closedWeek = $state<ClosedWeek | null>(null);
 	let currentSettings = $state<Settings | null>(null);
 	let error = $state('');
 
@@ -17,14 +18,19 @@
 		const from = dayKeys[0];
 		const to = dayKeys[6];
 		try {
-			const [ds, ws, s] = await Promise.all([
+			const [ds, ws, s, es] = await Promise.all([
 				days.list(from, to),
 				weeks.list(weekKey, weekKey),
-				settings.current()
+				settings.current(),
+				entries.list(from, to)
 			]);
 			closedDaysMap = Object.fromEntries((ds ?? []).map((d) => [d.day_key, d]));
 			closedWeek = (ws ?? []).find((w) => w.week_key === weekKey) ?? null;
 			currentSettings = s;
+			// Track which day_keys have at least one entry (for close-week guard).
+			const set = new Set<string>();
+			for (const e of (es ?? [])) set.add(e.day_key);
+			daysWithEntries = set;
 		} catch (e) {
 			error = e instanceof ApiError ? e.message : String(e);
 		}
@@ -61,10 +67,16 @@
 		currentSettings ? currentSettings.hours_per_week * 3_600_000 : 0
 	);
 
-	// Week can be closed if it's not already closed and the week has started
-	// (i.e. Monday ≤ today). The server enforces the detailed per-day rules.
+	// Week can be closed if it's not already closed, the week has started,
+	// and every past workday that has entries is also closed.
 	const canCloseWeek = $derived(
-		!closedWeek && dayKeys[0] <= todayKey()
+		!closedWeek &&
+		dayKeys[0] <= todayKey() &&
+		dayKeys.every((dk) => {
+			if (dk > todayKey()) return true;           // future day — skip
+			if (!daysWithEntries.has(dk)) return true;  // no entries — skip
+			return !!closedDaysMap[dk];                 // has entries → must be closed
+		})
 	);
 
 	function prevWeek() { weekKey = offsetWeek(weekKey, -1); }