diff --git a/uw_ct_service.install b/uw_ct_service.install
index 81c5d61b53008952174112b3ea1c1cc678034993..43447e8878a7241120de180906c85caca64d785b 100644
--- a/uw_ct_service.install
+++ b/uw_ct_service.install
@@ -10,10 +10,53 @@
  */
 function uw_ct_service_update_9101(&$sandbox) {
 
+  // Uninstall the office hours exceptions module.
   \Drupal::service('module_installer')->uninstall(['office_hours_exceptions']);
 
+  // Unset the core extension, so that we remove the warning
+  // about this module still being enabled.
   \Drupal::configFactory()
     ->getEditable('core.extension')
     ->clear('module.office_hours_exceptions')
     ->save(TRUE);
+
+  // Get all the service nodes.
+  $services = \Drupal::entityTypeManager()
+    ->getStorage('node')
+    ->loadByProperties(['type' => 'uw_ct_service']);
+
+  // Step through all service nodes and add the Closed
+  // to the exception days if an all day service.
+  foreach ($services as $service) {
+
+    // Get the hours field.
+    $hours = $service->field_uw_service_hours->getValue();
+
+    // If there are hours, check if we have to add closed
+    // to the exception days.
+    if ($hours) {
+
+      // Step through each of the hours and check exception
+      // days and see if we have to add closed.
+      foreach ($hours as $index => $hour) {
+
+        // If this an exception day (day > 6) and it is an
+        // all day service (start and end hours -1), then
+        // add Closed to the comments.
+        if (
+          $hour['day'] > 6 &&
+          $hour['starthours'] == '-1' &&
+          $hour['endhours'] == '-1'
+        ) {
+
+          // Add closed to the comments.
+          $hours[$index]['comment'] = 'Closed';
+        }
+      }
+
+      // Set the service hours and save the node.
+      $service->set('field_uw_service_hours', $hours);
+      $service->save();
+    }
+  }
 }