diff --git a/README.md b/README.md
index bda68a8..3ba7545 100644
--- a/README.md
+++ b/README.md
@@ -285,6 +285,8 @@ Notes:
 - Header month/year links target `chronological:YYYY:MM` and `chronological:YYYY`.
 - Prev/next month buttons update the widget in-place without a full page reload.
 - Month switches fetch server-rendered widget HTML via AJAX and replace only the widget node.
+- Calendar output is marked as non-cacheable to keep missing/existing link styling and
+  current-day highlighting up to date.
 
 ### 0.4) Virtual chronological day pages
 
@@ -300,6 +302,18 @@ The virtual page includes:
 
 The page is only created once you edit and save actual content.
 
+### 0.5) Cache invalidation
+
+luxtools provides an admin-only **Invalidate Cache** action in the page tools menu.
+
+- Purges the **entire** DokuWiki cache directory (`data/cache/*`).
+- This covers rendered pages, parsed instructions, CSS/JS bundles, and all
+  luxtools-specific caches (thumbnails, pagelink mapping).
+- Useful after deploying plugin or template changes (replaces the old
+  `touch conf/local.php` step in `deploy.sh` which often failed due to
+  permission errors).
+- Also useful when actively adding external photos to the current day page.
+
 ### 1) List files by glob pattern
 
 The `{{directory>...}}` syntax (or `{{files>...}}` for backwards compatibility) can handle both directory listings and glob patterns. When a glob pattern is used, it renders as a table:
diff --git a/action.php b/action.php
index f6d7ed7..009897d 100644
--- a/action.php
+++ b/action.php
@@ -3,11 +3,13 @@
 use dokuwiki\Extension\ActionPlugin;
 use dokuwiki\Extension\Event;
 use dokuwiki\Extension\EventHandler;
+use dokuwiki\plugin\luxtools\CacheInvalidation;
 use dokuwiki\plugin\luxtools\ChronoID;
 use dokuwiki\plugin\luxtools\ChronologicalCalendarWidget;
 use dokuwiki\plugin\luxtools\ChronologicalDateAutoLinker;
 use dokuwiki\plugin\luxtools\ChronologicalDayTemplate;
 use dokuwiki\plugin\luxtools\ChronologicalIcsEvents;
+use dokuwiki\plugin\luxtools\MenuItem\InvalidateCache;
 require_once(__DIR__ . '/autoload.php');
 
 /**
@@ -69,6 +71,18 @@ class action_plugin_luxtools extends ActionPlugin
             $this,
             "handleCalendarWidgetAjax",
         );
+        $controller->register_hook(
+            "ACTION_ACT_PREPROCESS",
+            "BEFORE",
+            $this,
+            "handleInvalidateCacheAction",
+        );
+        $controller->register_hook(
+            "MENU_ITEMS_ASSEMBLY",
+            "AFTER",
+            $this,
+            "addInvalidateCacheMenuItem",
+        );
         $controller->register_hook(
             "TOOLBAR_DEFINE",
             "AFTER",
@@ -137,6 +151,8 @@ class action_plugin_luxtools extends ActionPlugin
             return;
         }
 
+        $this->sendNoStoreHeaders();
+
         $html = ChronologicalCalendarWidget::render($year, $month, $baseNs);
         if ($html === '') {
             http_status(500);
@@ -391,6 +407,9 @@ class action_plugin_luxtools extends ActionPlugin
         if ($id === '') return;
 
         if (!ChronoID::isDayId($id)) return;
+
+        $this->sendNoStoreHeaders();
+
         if (function_exists('page_exists') && page_exists($id)) return;
 
         $wikiText = ChronologicalDayTemplate::buildForDayId($id) ?? '';
@@ -578,4 +597,99 @@ class action_plugin_luxtools extends ActionPlugin
             "block" => false,
         ];
     }
+
+    /**
+     * Add admin-only page-tools item to invalidate luxtools caches.
+     *
+     * @param Event $event
+     * @param mixed $param
+     * @return void
+     */
+    public function addInvalidateCacheMenuItem(Event $event, $param)
+    {
+        if (!is_array($event->data)) return;
+        if (($event->data['view'] ?? '') !== 'page') return;
+        if (!function_exists('auth_isadmin') || !auth_isadmin()) return;
+        if (!isset($event->data['items']) || !is_array($event->data['items'])) return;
+
+        $label = (string)$this->getLang('cache_invalidate_button');
+        if ($label === '') $label = 'Invalidate Cache';
+
+        $title = (string)$this->getLang('cache_invalidate_button_title');
+        if ($title === '') $title = 'Invalidate luxtools cache for this page';
+
+        $event->data['items'][] = new InvalidateCache($label, $title);
+    }
+
+    /**
+     * Handle manual cache invalidation action.
+     *
+     * @param Event $event
+     * @param mixed $param
+     * @return void
+     */
+    public function handleInvalidateCacheAction(Event $event, $param)
+    {
+        if (!is_string($event->data) || $event->data !== 'show') return;
+
+        global $INPUT;
+        if (!$INPUT->bool('luxtools_invalidate_cache')) return;
+
+        global $ID;
+        $id = is_string($ID) ? $ID : '';
+        if (function_exists('cleanID')) {
+            $id = (string)cleanID($id);
+        }
+
+        if (!function_exists('auth_isadmin') || !auth_isadmin()) {
+            $message = (string)$this->getLang('cache_invalidate_denied');
+            if ($message === '') $message = 'Only admins can invalidate cache.';
+            msg($message, -1);
+            $this->redirectToShow($id);
+            return;
+        }
+
+        if (!checkSecurityToken()) {
+            $message = (string)$this->getLang('cache_invalidate_badtoken');
+            if ($message === '') $message = 'Security token mismatch. Please retry.';
+            msg($message, -1);
+            $this->redirectToShow($id);
+            return;
+        }
+
+        $removed = CacheInvalidation::purgeAll();
+        $message = (string)$this->getLang('cache_invalidate_success');
+        if ($message === '') {
+            $message = 'DokuWiki cache invalidated.';
+        }
+        msg($message . ' (' . $removed . ')', 1);
+
+        $this->redirectToShow($id);
+    }
+
+    /**
+     * Redirect to normal show view for the given page.
+     *
+     * @param string $id
+     * @return void
+     */
+    protected function redirectToShow(string $id): void
+    {
+        $params = ['do' => 'show'];
+        send_redirect(wl($id, $params, true, '&'));
+    }
+
+    /**
+     * Send no-store cache headers for highly dynamic responses.
+     *
+     * @return void
+     */
+    protected function sendNoStoreHeaders(): void
+    {
+        if (headers_sent()) return;
+
+        header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
+        header('Pragma: no-cache');
+        header('Expires: 0');
+    }
 }
diff --git a/deploy.sh b/deploy.sh
index bac9d6f..70340d1 100755
--- a/deploy.sh
+++ b/deploy.sh
@@ -93,20 +93,4 @@ echo "Deploying luxtools to:   $TARGET/"
 
 rsync "${RSYNC_ARGS[@]}" "$SRC_DIR/" "$TARGET/"
 
-# Invalidate DokuWiki cache by touching conf/local.php
-# This forces DokuWiki to rebuild JavaScript/CSS bundles
-CONF_LOCAL="$(dirname "$TARGET")/../../conf/local.php"
-if [[ -f "$CONF_LOCAL" ]]; then
-  if ((DRY_RUN)); then
-    echo "(dry-run) Would touch $CONF_LOCAL to invalidate cache"
-  elif touch "$CONF_LOCAL" 2>/dev/null; then
-    echo "Cache invalidated (touched conf/local.php)"
-  else
-    echo "Note: Cannot touch conf/local.php (permission denied)."
-    echo "      Run 'touch conf/local.php' on the server to clear cache."
-  fi
-else
-  echo "Note: conf/local.php not found at expected path, skip cache invalidation."
-fi
-
 echo "Done."
diff --git a/lang/de/lang.php b/lang/de/lang.php
index 4a47c86..57c9a8b 100644
--- a/lang/de/lang.php
+++ b/lang/de/lang.php
@@ -85,3 +85,8 @@ $lang["pagelink_unlinked"] = "Seite nicht verknüpft";
 $lang["pagelink_multi_warning"] = "Mehrere Ordner verknüpft";
 $lang["chronological_photos_title"] = "Fotos";
 $lang["chronological_events_title"] = "Termine";
+$lang["cache_invalidate_button"] = "Cache invalidieren";
+$lang["cache_invalidate_button_title"] = "Gesamten DokuWiki-Cache leeren";
+$lang["cache_invalidate_success"] = "DokuWiki-Cache invalidiert.";
+$lang["cache_invalidate_denied"] = "Nur Admins dürfen den Cache invalidieren.";
+$lang["cache_invalidate_badtoken"] = "Sicherheits-Token ungültig. Bitte erneut versuchen.";
diff --git a/lang/en/lang.php b/lang/en/lang.php
index e3efdfb..ef0d308 100644
--- a/lang/en/lang.php
+++ b/lang/en/lang.php
@@ -86,3 +86,8 @@ $lang["pagelink_multi_warning"] = "Multiple folders linked";
 $lang["calendar_err_badmonth"] = "Invalid calendar month. Use YYYY-MM.";
 $lang["chronological_photos_title"] = "Photos";
 $lang["chronological_events_title"] = "Events";
+$lang["cache_invalidate_button"] = "Invalidate Cache";
+$lang["cache_invalidate_button_title"] = "Purge the entire DokuWiki cache";
+$lang["cache_invalidate_success"] = "DokuWiki cache invalidated.";
+$lang["cache_invalidate_denied"] = "Only admins can invalidate cache.";
+$lang["cache_invalidate_badtoken"] = "Security token mismatch. Please retry.";
diff --git a/src/CacheInvalidation.php b/src/CacheInvalidation.php
new file mode 100644
index 0000000..b3016b0
--- /dev/null
+++ b/src/CacheInvalidation.php
@@ -0,0 +1,71 @@
+<?php
+
+namespace dokuwiki\plugin\luxtools;
+
+/**
+ * Cache invalidation helpers for luxtools.
+ *
+ * Provides a full DokuWiki cache purge (all rendered pages, instructions,
+ * CSS/JS bundles) as well as luxtools-specific cache cleanup (thumbnails,
+ * pagelink mapping).
+ */
+class CacheInvalidation
+{
+    /**
+     * Purge the complete DokuWiki cache directory.
+     *
+     * This removes all files and subdirectories inside the configured
+     * cache directory ($conf['cachedir']).  It is equivalent to running
+     * `rm -rf data/cache/*` on the server.
+     *
+     * @return int Number of removed entries.
+     */
+    public static function purgeAll(): int
+    {
+        global $conf;
+
+        $cacheDir = rtrim((string)($conf['cachedir'] ?? ''), '/');
+        if ($cacheDir === '' || !is_dir($cacheDir)) {
+            return 0;
+        }
+
+        return self::removeDirectoryEntries($cacheDir);
+    }
+
+    /**
+     * Remove all files and subdirectories inside a directory
+     * without removing the directory itself.
+     *
+     * @param string $directory
+     * @return int Number of removed files/directories.
+     */
+    public static function removeDirectoryEntries(string $directory): int
+    {
+        if ($directory === '' || !is_dir($directory) || !is_readable($directory)) {
+            return 0;
+        }
+
+        $entries = @scandir($directory);
+        if (!is_array($entries)) return 0;
+
+        $removed = 0;
+        foreach ($entries as $entry) {
+            if ($entry === '.' || $entry === '..') continue;
+
+            $path = $directory . '/' . $entry;
+            if (is_dir($path) && !is_link($path)) {
+                $removed += self::removeDirectoryEntries($path);
+                if (@rmdir($path)) {
+                    $removed++;
+                }
+                continue;
+            }
+
+            if ((is_file($path) || is_link($path)) && @unlink($path)) {
+                $removed++;
+            }
+        }
+
+        return $removed;
+    }
+}
diff --git a/src/MenuItem/InvalidateCache.php b/src/MenuItem/InvalidateCache.php
new file mode 100644
index 0000000..d78687c
--- /dev/null
+++ b/src/MenuItem/InvalidateCache.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace dokuwiki\plugin\luxtools\MenuItem;
+
+use dokuwiki\Menu\Item\AbstractItem;
+
+class InvalidateCache extends AbstractItem
+{
+    /**
+     * @param string $label
+     * @param string $title
+     */
+    public function __construct(string $label, string $title)
+    {
+        global $ID;
+
+        $this->id = is_string($ID) ? $ID : '';
+        $this->type = 'show';
+        $this->method = 'get';
+        $this->params = [
+            'do' => 'show',
+            'luxtools_invalidate_cache' => 1,
+        ];
+        $this->nofollow = true;
+        $this->label = $label;
+        $this->title = $title;
+        $this->svg = DOKU_INC . 'lib/images/menu/calendar-clock.svg';
+
+        if (function_exists('getSecurityToken')) {
+            $this->params['sectok'] = getSecurityToken();
+        }
+    }
+
+    /**
+     * Keep a distinct class hook for template styling.
+     *
+     * @return string
+     */
+    public function getType()
+    {
+        return 'luxtools-invalidate-cache';
+    }
+}
diff --git a/syntax/calendar.php b/syntax/calendar.php
index 1280bd9..6ba22a3 100644
--- a/syntax/calendar.php
+++ b/syntax/calendar.php
@@ -72,6 +72,8 @@ class syntax_plugin_luxtools_calendar extends SyntaxPlugin
         if ($format !== 'xhtml') return false;
         if (!($renderer instanceof Doku_Renderer_xhtml)) return false;
 
+        $renderer->nocache();
+
         if (!($data['ok'] ?? false)) {
             $message = (string)$this->getLang((string)($data['error'] ?? 'calendar_err_badmonth'));
             if ($message === '') $message = 'Invalid calendar month. Use YYYY-MM.';