diff --git a/frontend/css/app.css b/frontend/css/app.css
index cd1214b..01dfafa 100644
--- a/frontend/css/app.css
+++ b/frontend/css/app.css
@@ -675,12 +675,6 @@ a { color: var(--primary); text-decoration: none; }
   color: #fff;
   border-radius: 50%;
 }
-.qtr-cell.selected .qtr-day-num {
-  background: var(--primary);
-  color: #fff;
-  border-radius: 50%;
-  opacity: .55;
-}
 .qtr-day-num {
   font-size: 12px;
   font-weight: 500;
diff --git a/frontend/index.html b/frontend/index.html
index 291fad8..7bc3514 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -99,10 +99,10 @@
     </div>
     <div class="topbar-right">
       <div class="view-switcher">
+        <button class="view-btn" data-view="quarter" data-i18n="view_quarter">Quartal</button>
         <button class="view-btn" data-view="month" data-i18n="view_month">Monat</button>
         <button class="view-btn" data-view="week" data-i18n="view_week">Woche</button>
         <button class="view-btn" data-view="day" data-i18n="view_day">Tag</button>
-        <button class="view-btn" data-view="quarter" data-i18n="view_quarter">Quartal</button>
         <button class="view-btn" data-view="agenda" data-i18n="view_agenda">Termine</button>
       </div>
       <button class="icon-btn" id="btn-settings" data-i18n-title="settings_title" title="Einstellungen">
diff --git a/frontend/js/views/quarter.js b/frontend/js/views/quarter.js
index ffb0bcb..15093ac 100644
--- a/frontend/js/views/quarter.js
+++ b/frontend/js/views/quarter.js
@@ -1,4 +1,4 @@
-import { isToday, isSameDay, isPast, dayOfWeek, getISOWeekNumber } from '../utils.js';
+import { isToday, isPast, dayOfWeek } from '../utils.js';
 import { t } from '../i18n.js';
 
 export function renderQuarter(container, currentDate, events, onDayClick, onEventClick, weekStartDay = 'monday') {
@@ -56,10 +56,9 @@ export function renderQuarter(container, currentDate, events, onDayClick, onEven
         const key = dateKey(cell);
         const cellEvs = evMap[key] || [];
 
-        const isOther   = cell.getMonth() !== month;
-        const todayCls  = isToday(cell)          ? 'today'    : '';
-        const otherCls  = isOther                ? 'other-month' : '';
-        const selCls    = isSameDay(cell, currentDate) && !isToday(cell) ? 'selected' : '';
+        const isOther  = cell.getMonth() !== month;
+        const todayCls = isToday(cell) ? 'today'       : '';
+        const otherCls = isOther       ? 'other-month' : '';
 
         // Up to 3 event dots
         const dots = cellEvs.slice(0, 3).map(ev => {
@@ -71,7 +70,7 @@ export function renderQuarter(container, currentDate, events, onDayClick, onEven
           ? `<span class="qtr-dot-more">+${cellEvs.length - 3}</span>`
           : '';
 
-        rowsHtml += `<div class="qtr-cell ${todayCls} ${otherCls} ${selCls}" data-date="${key}">
+        rowsHtml += `<div class="qtr-cell ${todayCls} ${otherCls}" data-date="${key}">
           <div class="qtr-day-num">${cell.getDate()}</div>
           <div class="qtr-dots">${dots}${moreDot}</div>
         </div>`;