wp-slimstat · parhumm · Mar 16, 2026 · Mar 16, 2026 · Mar 16, 2026 · Mar 16, 2026
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,3 +1,12 @@
+= 5.4.3 - 2026-03-16 =
+
+Fixed
+- Fixed fatal error on servers without the PHP calendar extension ([PR #229](https://github.com/wp-slimstat/wp-slimstat/pull/229))
+- Added defensive fallback for corrupted `start_of_week` option in calendar-related reports
+
+Improved
+- Moved day names array to a class constant in DataBuckets for better maintainability
+
 = 5.4.2 - 2026-03-15 =
 
 Fixed

diff --git a/languages/wp-slimstat.pot b/languages/wp-slimstat.pot
@@ -2,14 +2,14 @@
 # This file is distributed under the GPL-2.0+.
 msgid ""
 msgstr ""
-"Project-Id-Version: SlimStat Analytics 5.4.2\n"
+"Project-Id-Version: SlimStat Analytics 5.4.3\n"
 "Report-Msgid-Bugs-To: https://wordpress.org/support/plugin/wp-slimstat\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"POT-Creation-Date: 2026-03-15T15:51:50+00:00\n"
+"POT-Creation-Date: 2026-03-16T10:28:33+00:00\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "X-Generator: WP-CLI 2.12.0\n"
 "X-Domain: wp-slimstat\n"

diff --git a/readme.txt b/readme.txt
@@ -5,7 +5,7 @@ Text Domain: wp-slimstat
 Requires at least: 5.6
 Requires PHP: 7.4
 Tested up to: 6.9.4
-Stable tag: 5.4.2
+Stable tag: 5.4.3
 License: GPL-2.0+
 License URI: https://www.gnu.org/licenses/gpl-2.0.html
 
@@ -75,6 +75,11 @@ An extensive knowledge base is available on our [website](https://www.wp-slimsta
 9. **Settings** - Plenty of options to customize the plugin's behavior
 
 == Changelog ==
+= 5.4.3 - 2026-03-16 =
+- **Fix**: Fixed fatal error on servers without the PHP calendar extension ([PR #229](https://github.com/wp-slimstat/wp-slimstat/pull/229))
+- **Fix**: Added defensive fallback for corrupted `start_of_week` option in calendar-related reports
+- **Improved**: Moved day names array to a class constant in DataBuckets for better maintainability
+
 = 5.4.2 - 2026-03-15 =
 - **Fix**: Fixed tracking data not being recorded on some server configurations — REST API and admin-ajax endpoints now return responses correctly ([PR #218](https://github.com/wp-slimstat/wp-slimstat/pull/218))
 - **Fix**: Fixed visitor locations showing a proxy server IP instead of the real visitor IP on Cloudflare-powered sites ([#150](https://github.com/wp-slimstat/wp-slimstat/issues/150))

diff --git a/src/Helpers/DataBuckets.php b/src/Helpers/DataBuckets.php
@@ -11,6 +11,8 @@
 
 class DataBuckets
 {
+    private const DAY_NAMES = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
+
     private $labels = [];
 
     private $prev_labels = [];
@@ -104,7 +106,7 @@ private function initSeqWeek(): void
     {
         $start       = (new \DateTime())->setTimestamp($this->start);
         $end         = (new \DateTime())->setTimestamp($this->end);
-        $startOfWeek = get_option('start_of_week', 1);
+        $startOfWeek = (int) get_option('start_of_week', 1);
 
         // Adjust start to the first day of the week
         $firstLabel     = $start->format($this->labelFormat);
@@ -115,7 +117,7 @@ private function initSeqWeek(): void
         }
 
         // Move start to the next week if it is not the start of the week
-        $start->modify('next ' . jddayofweek($startOfWeek - 1, 1));
+        $start->modify('next ' . (self::DAY_NAMES[$startOfWeek] ?? 'Monday'));
         if ($start->getTimestamp() <= $this->start) {
             $start->modify('+1 week');
         }

diff --git a/wp-slimstat.php b/wp-slimstat.php
@@ -3,7 +3,7 @@
  * Plugin Name: SlimStat Analytics
  * Plugin URI: https://wp-slimstat.com/
  * Description: The leading web analytics plugin for WordPress
- * Version: 5.4.2
+ * Version: 5.4.3
  * Author: Jason Crouse, VeronaLabs
  * Text Domain: wp-slimstat
  * Domain Path: /languages
@@ -20,7 +20,7 @@
 }
 
 // Set the plugin version and directory
-define('SLIMSTAT_ANALYTICS_VERSION', '5.4.2');
+define('SLIMSTAT_ANALYTICS_VERSION', '5.4.3');
 define('SLIMSTAT_FILE', __FILE__);
 define('SLIMSTAT_DIR', __DIR__);
 define('SLIMSTAT_URL', plugins_url('', __FILE__));