diff --git a/debug.log b/debug.log
index abe5875..720b457 100644
--- a/debug.log
+++ b/debug.log
@@ -54,3 +54,4 @@
 2026-03-18 02:26:44 - Items case hit
 2026-03-18 02:28:48 - Items case hit
 2026-03-18 02:28:58 - Items case hit
+2026-03-18 06:00:05 - Items case hit
diff --git a/index.php b/index.php
index 9d5c683..a7b32d2 100644
--- a/index.php
+++ b/index.php
@@ -49,6 +49,19 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
     file_put_contents('post_debug.log', date('Y-m-d H:i:s') . " - POST: " . json_encode($_POST) . "\n", FILE_APPEND);
 }
 require_once 'db/config.php';
+
+// Timezone Setup
+try {
+    $tz_stmt = db()->prepare("SELECT value FROM settings WHERE `key` = 'timezone'");
+    $tz_stmt->execute();
+    $app_tz = $tz_stmt->fetchColumn();
+    if ($app_tz && in_array($app_tz, DateTimeZone::listIdentifiers())) {
+        date_default_timezone_set($app_tz);
+    }
+} catch (Exception $e) {
+    // Ignore if DB not ready
+}
+
 require_once 'includes/DatabaseInstaller.php';
 
 // Auto-install database if not installed
@@ -8511,6 +8524,19 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
                     <label class="form-label" data-en="Address" data-ar="العنوان">Address</label>
                     <textarea name="settings[company_address]" class="form-control" rows="3"><?= htmlspecialchars($data['settings']['company_address'] ?? '') ?></textarea>
                 </div>
+                <div class="col-md-4 mt-3">
+                    <label class="form-label" data-en="Timezone" data-ar="المنطقة الزمنية">Timezone</label>
+                    <select name="settings[timezone]" class="form-select">
+                        <?php
+                        $tz_identifiers = DateTimeZone::listIdentifiers();
+                        $current_tz = $data['settings']['timezone'] ?? date_default_timezone_get();
+                        foreach ($tz_identifiers as $tz) {
+                            $selected = ($tz === $current_tz) ? 'selected' : '';
+                            echo "<option value=\"$tz\" $selected>$tz</option>";
+                        }
+                        ?>
+                    </select>
+                </div>
                 <div class="col-md-4 mt-3">
                     <label class="form-label" data-en="Allow Selling Out of Stock" data-ar="السماح بالبيع عند نفاذ المخزون">Allow Selling Out of Stock</label>
                     <select name="settings[allow_zero_stock_sell]" class="form-select">
diff --git a/post_debug.log b/post_debug.log
index 3a40a6a..0bfd25f 100644
--- a/post_debug.log
+++ b/post_debug.log
@@ -61,3 +61,9 @@
 2026-03-18 02:31:37 - POST: {"action":"save_theme","theme":"default"}
 2026-03-18 02:31:40 - POST: {"action":"save_theme","theme":"sunset"}
 2026-03-18 02:31:50 - POST: {"action":"save_theme","theme":"default"}
+2026-03-18 06:08:50 - POST: {"type":"customer","name":"Moosa Ali Al-Abri","email":"aalabry@gmail.com","phone":"99359472","tax_id":"","balance":"0.000","add_customer":""}
+2026-03-18 06:29:34 - POST: {"settings":{"company_name":"Bahjet Al-Safa Trading","company_phone":"99359472","company_email":"aalabry@gmail.com","vat_number":"OM25418","company_address":"AL Hamra\r\nOman","timezone":"Asia\/Muscat","allow_zero_stock_sell":"1","loyalty_enabled":"0","loyalty_points_per_unit":"1","loyalty_redeem_points_per_unit":"100"},"update_settings":""}
+2026-03-18 06:30:25 - POST: {"type":"sale","customer_id":"7","invoice_date":"2026-03-18","due_date":"","payment_type":"cash","status":"paid","paid_amount":"0.000","item_ids":["7"],"quantities":["5"],"prices":["0.250"],"add_invoice":""}
+2026-03-18 06:31:00 - POST: {"type":"sale","customer_id":"7","invoice_date":"2026-03-18","due_date":"","payment_type":"cash","status":"unpaid","paid_amount":"0.000","item_ids":["7"],"quantities":["1"],"prices":["0.250"],"add_invoice":""}
+2026-03-18 06:42:39 - POST: {"type":"sale","customer_id":"7","invoice_date":"2026-03-18","due_date":"","payment_type":"cash","status":"unpaid","paid_amount":"0.000","item_ids":["7"],"quantities":["1"],"prices":["0.250"],"add_invoice":""}
+2026-03-18 06:43:05 - POST: {"invoice_id":"31","customer_id":"7","invoice_date":"2026-03-18","due_date":"","payment_type":"cash","status":"paid","paid_amount":"0.000","item_ids":["7"],"quantities":["1.00"],"prices":["0.250"],"edit_invoice":""}
diff --git a/search_debug.log b/search_debug.log
index 2ac2aca..04f6478 100644
--- a/search_debug.log
+++ b/search_debug.log
@@ -1,3 +1,5 @@
 2026-02-25 04:49:58 - search_items call: q=on
 2026-02-25 12:57:14 - search_items call: q=on
 2026-02-25 17:10:03 - search_items call: q=on
+2026-03-18 10:30:10 - search_items call: q=to
+2026-03-18 10:30:56 - search_items call: q=to