diff --git a/apps/calendar/apps/web/src/lib/components/calendar/DateStrip.svelte b/apps/calendar/apps/web/src/lib/components/calendar/DateStrip.svelte
index 13e9783bd..6797fa0a1 100644
--- a/apps/calendar/apps/web/src/lib/components/calendar/DateStrip.svelte
+++ b/apps/calendar/apps/web/src/lib/components/calendar/DateStrip.svelte
@@ -26,6 +26,10 @@
 		contextMenu?.show(e.clientX, e.clientY);
 	}
 
+	function handleMinimize() {
+		settingsStore.set('dateStripCollapsed', true);
+	}
+
 	interface Props {
 		isSidebarMode?: boolean;
 		isToolbarExpanded?: boolean;
@@ -248,6 +252,13 @@
 	class:toolbar-expanded={isToolbarExpanded}
 	class:compact={settingsStore.dateStripCompact}
 >
+	<!-- Minimize button at left edge -->
+	<button class="minimize-btn" onclick={handleMinimize} title="Datumsleiste minimieren">
+		<svg fill="none" stroke="currentColor" viewBox="0 0 24 24" width="20" height="20">
+			<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7" />
+		</svg>
+	</button>
+
 	<!-- svelte-ignore a11y_no_static_element_interactions -->
 	<div class="date-strip-container" oncontextmenu={handleContextMenu}>
 		<!-- Month label -->
@@ -714,4 +725,47 @@
 	.date-strip-wrapper.compact .today-date {
 		font-size: 0.625rem;
 	}
+
+	/* Minimize button */
+	.minimize-btn {
+		position: absolute;
+		left: 0.5rem;
+		bottom: 34%;
+		transform: translateY(50%);
+		display: flex;
+		align-items: center;
+		justify-content: center;
+		width: 36px;
+		height: 36px;
+		background: transparent;
+		border: none;
+		border-radius: 8px;
+		cursor: pointer;
+		color: hsl(var(--color-muted-foreground));
+		pointer-events: auto;
+		transition: all 0.15s ease;
+		z-index: 10;
+	}
+
+	.minimize-btn:hover {
+		background: hsl(var(--color-muted) / 0.8);
+		color: hsl(var(--color-foreground));
+	}
+
+	.minimize-btn:active {
+		transform: translateY(50%) scale(0.95);
+	}
+
+	@media (max-width: 640px) {
+		.minimize-btn {
+			left: 0.25rem;
+			width: 32px;
+			height: 32px;
+		}
+
+		.minimize-btn svg {
+			width: 18px;
+			height: 18px;
+		}
+	}
 </style>