diff --git a/application/controllers/Backend.php b/application/controllers/Backend.php
index 77ffa9d0..ae9e705f 100755
--- a/application/controllers/Backend.php
+++ b/application/controllers/Backend.php
@@ -63,6 +63,7 @@ class Backend extends CI_Controller {
         $this->load->model('roles_model');
         $this->load->model('user_model');
         $this->load->model('secretaries_model');
+        $this->load->model('timezones_model');
 
         $view['base_url'] = $this->config->item('base_url');
         $view['user_display_name'] = $this->user_model->get_user_display_name($this->session->userdata('user_id'));
@@ -77,6 +78,7 @@ class Backend extends CI_Controller {
         $view['customers'] = $this->customers_model->get_batch();
         $user = $this->user_model->get_settings($this->session->userdata('user_id'));
         $view['calendar_view'] = $user['settings']['calendar_view'];
+        $view['timezones'] = $this->timezones_model->to_array();
         $this->set_user_data($view);
 
         if ($this->session->userdata('role_slug') === DB_SLUG_SECRETARY)
@@ -127,6 +129,7 @@ class Backend extends CI_Controller {
         $this->load->model('services_model');
         $this->load->model('settings_model');
         $this->load->model('user_model');
+        $this->load->model('timezones_model');
 
         $view['base_url'] = $this->config->item('base_url');
         $view['user_display_name'] = $this->user_model->get_user_display_name($this->session->userdata('user_id'));
@@ -139,6 +142,7 @@ class Backend extends CI_Controller {
         $view['customers'] = $this->customers_model->get_batch();
         $view['available_providers'] = $this->providers_model->get_available_providers();
         $view['available_services'] = $this->services_model->get_available_services();
+        $view['timezones'] = $this->timezones_model->to_array();
 
         if ($this->session->userdata('role_slug') === DB_SLUG_SECRETARY)
         {
@@ -178,6 +182,7 @@ class Backend extends CI_Controller {
         $this->load->model('services_model');
         $this->load->model('settings_model');
         $this->load->model('user_model');
+        $this->load->model('timezones_model');
 
         $view['base_url'] = $this->config->item('base_url');
         $view['user_display_name'] = $this->user_model->get_user_display_name($this->session->userdata('user_id'));
@@ -188,6 +193,7 @@ class Backend extends CI_Controller {
         $view['first_weekday'] = $this->settings_model->get_setting('first_weekday');
         $view['services'] = $this->services_model->get_batch();
         $view['categories'] = $this->services_model->get_all_categories();
+        $view['timezones'] = $this->timezones_model->to_array();
         $this->set_user_data($view);
 
         $this->load->view('backend/header', $view);
@@ -216,6 +222,7 @@ class Backend extends CI_Controller {
         $this->load->model('services_model');
         $this->load->model('settings_model');
         $this->load->model('user_model');
+        $this->load->model('timezones_model');
 
         $view['base_url'] = $this->config->item('base_url');
         $view['user_display_name'] = $this->user_model->get_user_display_name($this->session->userdata('user_id'));
@@ -229,7 +236,8 @@ class Backend extends CI_Controller {
         $view['secretaries'] = $this->secretaries_model->get_batch();
         $view['services'] = $this->services_model->get_batch();
         $view['working_plan'] = $this->settings_model->get_setting('company_working_plan');
-        $view['extra_working_plan'] = "{}";
+        $view['timezones'] = $this->timezones_model->to_array();
+        $view['extra_working_plan'] = '{}';
         $this->set_user_data($view);
 
         $this->load->view('backend/header', $view);
@@ -255,6 +263,7 @@ class Backend extends CI_Controller {
 
         $this->load->model('settings_model');
         $this->load->model('user_model');
+        $this->load->model('timezones_model');
 
         $this->load->library('session');
         $user_id = $this->session->userdata('user_id');
@@ -269,6 +278,7 @@ class Backend extends CI_Controller {
         $view['role_slug'] = $this->session->userdata('role_slug');
         $view['system_settings'] = $this->settings_model->get_settings();
         $view['user_settings'] = $this->user_model->get_settings($user_id);
+        $view['timezones'] = $this->timezones_model->to_array();
         $this->set_user_data($view);
 
         $this->load->view('backend/header', $view);
@@ -369,6 +379,7 @@ class Backend extends CI_Controller {
         // Get privileges
         $view['user_id'] = $this->session->userdata('user_id');
         $view['user_email'] = $this->session->userdata('user_email');
+        $view['timezone'] = $this->session->userdata('timezone');
         $view['role_slug'] = $this->session->userdata('role_slug');
         $view['privileges'] = $this->roles_model->get_privileges($this->session->userdata('role_slug'));
     }
diff --git a/application/models/Timezones_model.php b/application/models/Timezones_model.php
index 4a9f2091..d19833a9 100644
--- a/application/models/Timezones_model.php
+++ b/application/models/Timezones_model.php
@@ -461,14 +461,7 @@ class Timezones_Model extends CI_Model {
      */
     public function to_array()
     {
-        $continents = [];
-
-        foreach ($this->timezones as $continent => $timezones)
-        {
-            $continents[] = $timezones;
-        }
-
-        return array_merge($continents);
+        return array_merge(...array_values($this->timezones));
     }
 
     /**
diff --git a/application/views/backend/calendar.php b/application/views/backend/calendar.php
index 23051ae7..04a81b87 100755
--- a/application/views/backend/calendar.php
+++ b/application/views/backend/calendar.php
@@ -26,11 +26,13 @@
         'customers'             : <?= json_encode($customers) ?>,
         'secretaryProviders'    : <?= json_encode($secretary_providers) ?>,
         'calendarView'          : <?= json_encode($calendar_view) ?>,
+        'timezones'             : <?= json_encode($timezones) ?>,
         'user'                  : {
             'id'        : <?= $user_id ?>,
             'email'     : <?= json_encode($user_email) ?>,
+            'timezone'  : <?= json_encode($timezone) ?>,
             'role_slug' : <?= json_encode($role_slug) ?>,
-            'privileges': <?= json_encode($privileges) ?>
+            'privileges': <?= json_encode($privileges) ?>,
         }
     };
 
diff --git a/application/views/backend/customers.php b/application/views/backend/customers.php
index f4109f24..3f1d527f 100755
--- a/application/views/backend/customers.php
+++ b/application/views/backend/customers.php
@@ -1,4 +1,4 @@
-<script src="<?= asset_url('assets/ext/jquery-ui/jquery-ui-timepicker-addon.js') ?>"></script>
+<script src="<?= asset_url('assets/ext/jquery-ui/jquery-ui-timepicker-addon.min.js') ?>"></script>
 <script src="<?= asset_url('assets/js/backend_customers_helper.js') ?>"></script>
 <script src="<?= asset_url('assets/js/backend_customers.js') ?>"></script>
 <script>
@@ -11,9 +11,11 @@
         timeFormat         : <?= json_encode($time_format) ?>,
         baseUrl            : <?= json_encode($base_url) ?>,
         customers          : <?= json_encode($customers) ?>,
+        timezones          : <?= json_encode($timezones) ?>,
         user               : {
             id         : <?= $user_id ?>,
             email      : <?= json_encode($user_email) ?>,
+            timezone   : <?= json_encode($timezone) ?>,
             role_slug  : <?= json_encode($role_slug) ?>,
             privileges : <?= json_encode($privileges) ?>
         }
diff --git a/application/views/backend/services.php b/application/views/backend/services.php
index 22c25c47..5f1f55a9 100755
--- a/application/views/backend/services.php
+++ b/application/views/backend/services.php
@@ -9,9 +9,11 @@
         timeFormat    : <?= json_encode($time_format) ?>,
         services      : <?= json_encode($services) ?>,
         categories    : <?= json_encode($categories) ?>,
+        timezones     : <?= json_encode($timezones) ?>,
         user          : {
             id        : <?= $user_id ?>,
             email     : <?= json_encode($user_email) ?>,
+            timezone  : <?= json_encode($timezone) ?>,
             role_slug : <?= json_encode($role_slug) ?>,
             privileges: <?= json_encode($privileges) ?>
         }
diff --git a/application/views/backend/settings.php b/application/views/backend/settings.php
index 6f00bd10..43d262f9 100755
--- a/application/views/backend/settings.php
+++ b/application/views/backend/settings.php
@@ -12,6 +12,7 @@
         'firstWeekday'  : <?= json_encode($first_weekday); ?>,
         'timeFormat'    : <?= json_encode($time_format) ?>,
         'userSlug'      : <?= json_encode($role_slug) ?>,
+        'timezones'     : <?= json_encode($timezones) ?>,
         'settings'      : {
             'system'    : <?= json_encode($system_settings) ?>,
             'user'      : <?= json_encode($user_settings) ?>
@@ -19,6 +20,7 @@
         'user'          : {
             'id'        : <?= $user_id ?>,
             'email'     : <?= json_encode($user_email) ?>,
+            'timezone'  : <?= json_encode($timezone) ?>,
             'role_slug' : <?= json_encode($role_slug) ?>,
             'privileges': <?= json_encode($privileges) ?>
         }
diff --git a/application/views/backend/users.php b/application/views/backend/users.php
index 0bde3849..9b12b611 100755
--- a/application/views/backend/users.php
+++ b/application/views/backend/users.php
@@ -7,20 +7,22 @@
 <script src="<?= asset_url('assets/ext/jquery-jeditable/jquery.jeditable.min.js') ?>"></script>
 <script>
     var GlobalVariables = {
-        csrfToken      : <?= json_encode($this->security->get_csrf_hash()) ?>,
-        baseUrl        : <?= json_encode($base_url) ?>,
-        dateFormat     : <?= json_encode($date_format) ?>,
-        firstWeekday   : <?= json_encode($first_weekday); ?>,
-        timeFormat     : <?= json_encode($time_format) ?>,
-        admins         : <?= json_encode($admins) ?>,
-        providers      : <?= json_encode($providers) ?>,
-        secretaries    : <?= json_encode($secretaries) ?>,
-        services       : <?= json_encode($services) ?>,
-        workingPlan    : <?= json_encode(json_decode($working_plan)) ?>,
-        extraWorkingPlan    : <?= json_encode(json_decode($extra_working_plan)) ?>,
+        csrfToken         : <?= json_encode($this->security->get_csrf_hash()) ?>,
+        baseUrl           : <?= json_encode($base_url) ?>,
+        dateFormat        : <?= json_encode($date_format) ?>,
+        firstWeekday      : <?= json_encode($first_weekday); ?>,
+        timeFormat        : <?= json_encode($time_format) ?>,
+        admins            : <?= json_encode($admins) ?>,
+        providers         : <?= json_encode($providers) ?>,
+        secretaries       : <?= json_encode($secretaries) ?>,
+        services          : <?= json_encode($services) ?>,
+        timezones         : <?= json_encode($timezones) ?>,
+        workingPlan       : <?= json_encode(json_decode($working_plan)) ?>,
+        extraWorkingPlan  : <?= json_encode(json_decode($extra_working_plan)) ?>,
         user           : {
             id         : <?= $user_id ?>,
             email      : <?= json_encode($user_email) ?>,
+            timezone   : <?= json_encode($timezone) ?>,
             role_slug  : <?= json_encode($role_slug) ?>,
             privileges : <?= json_encode($privileges) ?>
         }