diff --git a/Clocker/Overall App/DataStore.swift b/Clocker/Overall App/DataStore.swift
index bce8b24..57264c6 100644
--- a/Clocker/Overall App/DataStore.swift	
+++ b/Clocker/Overall App/DataStore.swift	
@@ -46,8 +46,8 @@ class DataStore: NSObject {
         shouldDisplayDateInMenubar = shouldDisplay(.dateInMenubar)
         setupSyncNotification()
     }
-    
-     func setupSyncNotification() {
+
+    func setupSyncNotification() {
         if shouldDisplay(.sync) {
             ubiquitousStore = NSUbiquitousKeyValueStore.default
             NotificationCenter.default.addObserver(self,
@@ -72,6 +72,8 @@ class DataStore: NSObject {
         if cloudTimezones != currentTimezones {
             Logger.info("Syncing local timezones with data from the ☁️")
             userDefaults.set(cloudTimezones, forKey: CLDefaultPreferenceKey)
+            NotificationCenter.default.post(name: DataStore.didSyncFromExternalSourceNotification,
+                                            object: self)
         }
     }
 
@@ -201,3 +203,7 @@ class DataStore: NSObject {
         return value.isEqual(to: NSNumber(value: 0))
     }
 }
+
+extension DataStore {
+    public static let didSyncFromExternalSourceNotification: NSNotification.Name = .init("didSyncFromExternalSourceNotification")
+}
diff --git a/Clocker/Panel/ParentPanelController.swift b/Clocker/Panel/ParentPanelController.swift
index 5fb0cbe..146dade 100644
--- a/Clocker/Panel/ParentPanelController.swift
+++ b/Clocker/Panel/ParentPanelController.swift
@@ -196,15 +196,13 @@ class ParentPanelController: NSWindowController {
                                                name: NSNotification.Name.NSSystemTimeZoneDidChange,
                                                object: nil)
 
-        if DataStore.shared().shouldDisplay(.sync) {
-            NotificationCenter.default.addObserver(forName: NSUbiquitousKeyValueStore.didChangeExternallyNotification,
-                                                   object: self,
-                                                   queue: OperationQueue.main)
-            { [weak self] _ in
-                if let sSelf = self {
-                    sSelf.mainTableView.reloadData()
-                    sSelf.setScrollViewConstraint()
-                }
+        NotificationCenter.default.addObserver(forName: DataStore.didSyncFromExternalSourceNotification,
+                                               object: self,
+                                               queue: OperationQueue.main)
+        { [weak self] _ in
+            if let sSelf = self {
+                sSelf.mainTableView.reloadData()
+                sSelf.setScrollViewConstraint()
             }
         }
 
diff --git a/Clocker/Preferences/Appearance/AppearanceViewController.swift b/Clocker/Preferences/Appearance/AppearanceViewController.swift
index 04b66a3..6030146 100644
--- a/Clocker/Preferences/Appearance/AppearanceViewController.swift
+++ b/Clocker/Preferences/Appearance/AppearanceViewController.swift
@@ -359,7 +359,7 @@ class AppearanceViewController: ParentViewController {
         previewPanelTableView.reloadData()
     }
 
-    @IBAction func toggleSync(_ sender: NSSegmentedControl) {
+    @IBAction func toggleSync(_: NSSegmentedControl) {
         DataStore.shared().setupSyncNotification()
     }
 }
diff --git a/Clocker/Preferences/General/PreferencesViewController.swift b/Clocker/Preferences/General/PreferencesViewController.swift
index c29f067..4226215 100644
--- a/Clocker/Preferences/General/PreferencesViewController.swift
+++ b/Clocker/Preferences/General/PreferencesViewController.swift
@@ -93,14 +93,12 @@ class PreferencesViewController: ParentViewController {
                                                name: NSNotification.Name.customLabelChanged,
                                                object: nil)
 
-        if DataStore.shared().shouldDisplay(.sync) {
-            NotificationCenter.default.addObserver(forName: NSUbiquitousKeyValueStore.didChangeExternallyNotification,
-                                                   object: self,
-                                                   queue: OperationQueue.main)
-            { [weak self] _ in
-                if let sSelf = self {
-                    sSelf.refreshTimezoneTableView()
-                }
+        NotificationCenter.default.addObserver(forName: DataStore.didSyncFromExternalSourceNotification,
+                                               object: self,
+                                               queue: OperationQueue.main)
+        { [weak self] _ in
+            if let sSelf = self {
+                sSelf.refreshTimezoneTableView()
             }
         }