diff --git a/calendar_events.php b/calendar_events.php
index 68bc44c46..e8f7eac4f 100644
--- a/calendar_events.php
+++ b/calendar_events.php
@@ -261,6 +261,14 @@
             ?>
         ],
         eventOrder: 'allDay,start,-duration,title',
+
+        <?php
+        // User preference for Calendar start day (Sunday/Monday)
+        // Fetch User Dashboard Settings
+        $row = mysqli_fetch_array(mysqli_query($mysqli, "SELECT user_config_calendar_first_day FROM user_settings WHERE user_id = $session_user_id"));
+        $user_config_calendar_first_day = intval($row['user_config_calendar_first_day']);
+        ?>
+        firstDay: <?php echo $user_config_calendar_first_day ?>,
         });
 
         calendar.render();
@@ -293,4 +301,4 @@ function updateIncrementEndTime() {
         // Update the end date field
         document.getElementById("event_add_end").value = new_end;
     }
-</script>
\ No newline at end of file
+</script>
diff --git a/database_updates.php b/database_updates.php
index 7bff938b3..416606735 100644
--- a/database_updates.php
+++ b/database_updates.php
@@ -1912,10 +1912,16 @@
          mysqli_query($mysqli, "UPDATE `settings` SET `config_current_database_version` = '1.3.1'");
      }
 
-    // if (CURRENT_DATABASE_VERSION == '1.3.1') {
-    //     // Insert queries here required to update to DB version 1.3.1
+     if (CURRENT_DATABASE_VERSION == '1.3.1') {
+         mysqli_query($mysqli, "ALTER TABLE `user_settings` ADD `user_config_calendar_first_day` TINYINT(1) NOT NULL DEFAULT 0 AFTER `user_config_dashboard_technical_enable`");
+
+         mysqli_query($mysqli, "UPDATE `settings` SET `config_current_database_version` = '1.3.2'");
+     }
+
+    // if (CURRENT_DATABASE_VERSION == '1.3.2') {
+    //     // Insert queries here required to update to DB version 1.3.2
     //     // Then, update the database to the next sequential version
-    //     mysqli_query($mysqli, "UPDATE `settings` SET `config_current_database_version` = '1.3.2'");
+    //     mysqli_query($mysqli, "UPDATE `settings` SET `config_current_database_version` = '1.3.3'");
     // }
 
 } else {
diff --git a/database_version.php b/database_version.php
index e55dd88e0..c976e9a15 100644
--- a/database_version.php
+++ b/database_version.php
@@ -5,4 +5,4 @@
  * It is used in conjunction with database_updates.php
  */
 
-DEFINE("LATEST_DATABASE_VERSION", "1.3.1");
+DEFINE("LATEST_DATABASE_VERSION", "1.3.2");
diff --git a/db.sql b/db.sql
index 4059d7118..81dc9df44 100644
--- a/db.sql
+++ b/db.sql
@@ -1822,6 +1822,7 @@ CREATE TABLE `user_settings` (
   `user_config_records_per_page` int(11) NOT NULL DEFAULT 10,
   `user_config_dashboard_financial_enable` tinyint(1) NOT NULL DEFAULT 0,
   `user_config_dashboard_technical_enable` tinyint(1) NOT NULL DEFAULT 0,
+  `user_config_calendar_first_day` tinyint(1) NOT NULL DEFAULT 0,
   PRIMARY KEY (`user_id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COLLATE=utf8mb3_general_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
diff --git a/post/profile.php b/post/profile.php
index 9bfc3dcc9..d03a53ef6 100644
--- a/post/profile.php
+++ b/post/profile.php
@@ -144,11 +144,18 @@
     header('Location: post.php?logout');
 }
 
-if (isset($_POST['edit_your_user_browser_extention'])) {
+if (isset($_POST['edit_your_user_preferences'])) {
 
     // CSRF Check
     validateCSRFToken($_POST['csrf_token']);
 
+    $calendar_first_day = intval($_POST['calendar_first_day']);
+
+    // Calendar
+    if (isset($calendar_first_day)) {
+        mysqli_query($mysqli, "UPDATE user_settings SET user_config_calendar_first_day = $calendar_first_day WHERE user_id = $session_user_id");
+    }
+
     // Enable extension access, only if it isn't already setup (user doesn't have cookie)
     if (isset($_POST['extension']) && $_POST['extension'] == 'Yes') {
         if (!isset($_COOKIE['user_extension_key'])) {
diff --git a/user_preferences.php b/user_preferences.php
index 1c5b29761..77426f7f7 100644
--- a/user_preferences.php
+++ b/user_preferences.php
@@ -1,30 +1,46 @@
 <?php
 require_once "inc_all_user.php";
 
+$row = mysqli_fetch_array(mysqli_query($mysqli, "SELECT user_config_calendar_first_day FROM user_settings WHERE user_id = $session_user_id"));
+$user_config_calendar_first_day = intval($row['user_config_calendar_first_day']);
+
 ?>
 
 <div class="card card-dark">
     <div class="card-header py-3">
-        <h3 class="card-title"><i class="fas fa-fw fa-globe mr-2"></i>Browser Extension</h3>
+        <h3 class="card-title"><i class="fas fa-fw fa-globe mr-2"></i>Preferences</h3>
     </div>
     <div class="card-body">
 
         <form action="post.php" method="post" enctype="multipart/form-data" autocomplete="off">
             <input type="hidden" name="csrf_token" value="<?php echo $_SESSION['csrf_token'] ?>">
 
+            <div class="form-group">
+                <label>Calendar starts on<strong class="text-danger">*</strong></label>
+                <div class="input-group">
+                    <div class="input-group-prepend">
+                        <span class="input-group-text"><i class="fa fa-fw fa-calendar-day"></i></span>
+                    </div>
+                    <select class="form-control select2" name="calendar_first_day" required>
+                        <option <?php if ($user_config_calendar_first_day == '0') { echo "selected"; } ?> value="0" >Sunday</option>
+                        <option <?php if ($user_config_calendar_first_day == '1') { echo "selected"; } ?> value="1" >Monday</option>
+                    </select>
+                </div>
+            </div>
+
             <?php if ($session_user_role > 1) { ?>
 
                 <div class="form-group">
                     <div class="form-check">
-                        <input type="checkbox" class="form-check-input" name="extension" id="extension" value="Yes" <?php if (isset($_COOKIE['user_extension_key'])) {echo "checked";} ?>>
+                        <input disabled="disabled" type="checkbox" class="form-check-input" name="extension" id="extension" value="Yes" <?php if (isset($_COOKIE['user_extension_key'])) {echo "checked";} ?>>
                         <label class="form-check-label" for="extension">Enable Browser Extention?</label>
-                        <p class="small">Note: You must log out and back in again for these changes take effect.</p>
+                        <p class="small">Not currently in use / Note: You must log out and back in again for these changes take effect.</p>
                     </div>
                 </div>
 
             <?php } ?>
 
-            <button type="submit" name="edit_your_user_browser_extension" class="btn btn-primary btn-block mt-3"><i class="fas fa-check mr-2"></i>Save</button>
+            <button type="submit" name="edit_your_user_preferences" class="btn btn-primary btn-block mt-3"><i class="fas fa-check mr-2"></i>Save</button>
 
         </form>