diff --git a/web/src/routes/week/+page.svelte b/web/src/routes/week/+page.svelte
index d75c031..95b839d 100644
--- a/web/src/routes/week/+page.svelte
+++ b/web/src/routes/week/+page.svelte
@@ -9,7 +9,7 @@
 	let dayKeys = $derived(weekDayKeys(weekKey));
 	let closedDaysMap: Record<string, ClosedDay> = $state({});
 	let closedWeek: ClosedWeek | null = $state(null);
-	let currentSettings: Settings | null = $state(null);
+	let currentSettings = $state<Settings | null>(null);
 	let error = $state('');
 
 	async function load() {
@@ -61,10 +61,10 @@
 		currentSettings ? currentSettings.hours_per_week * 3_600_000 : 0
 	);
 
-	const allWorkdaysClosed = $derived(
-		currentSettings
-			? dayKeys.every((dk) => !isWorkday(dk, currentSettings!.workdays_mask) || !!closedDaysMap[dk])
-			: false
+	// 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.
+	const canCloseWeek = $derived(
+		!closedWeek && dayKeys[0] <= todayKey()
 	);
 
 	function prevWeek() { weekKey = offsetWeek(weekKey, -1); }
@@ -132,10 +132,8 @@
 			<p>Week closed — overtime: <strong>{formatDelta(closedWeek.delta_ms)}</strong></p>
 			<button onclick={handleReopenWeek}>Reopen week</button>
 		</div>
-	{:else if allWorkdaysClosed}
+	{:else if canCloseWeek}
 		<button class="btn close-week" onclick={handleCloseWeek}>Close week</button>
-	{:else}
-		<p class="hint">Close all workdays to close the week.</p>
 	{/if}
 </div>
 
@@ -167,5 +165,4 @@
 	.btn.close-week { background: #343a40; color: #fff; border: none; padding: 0.55rem 1.4rem; border-radius: 6px; font-size: 1rem; font-weight: 600; }
 	.week-closed { background: #d4edda; border-radius: 8px; padding: 0.75rem 1rem; display: flex; align-items: center; justify-content: space-between; }
 	.week-closed button { background: none; border: 1px solid #155724; color: #155724; border-radius: 6px; padding: 0.3rem 0.6rem; font-size: 0.875rem; }
-	.hint { color: #6c757d; font-size: 0.875rem; font-style: italic; }
 </style>