World Clock Deluxe lets you add a status menu towards the right end of the menu bar so that you can quickly view clocks.
On macOS 13 or later, choose World Clock Deluxe > Settings. On macOS 12, choose World Clock Deluxe > Preferences. Then click Menu Bar.
Select the "Show clocks in the menu bar" checkbox.
To display clocks, click the status menu icon: all your clocks will appear in the menu. If you want, you can customize the menu so that it lists only the clocks that are visible in the menu bar.
Command-click the World Clock Deluxe status menu icon or clock and drag it.
Related topics
Customize the World Clock Deluxe status menu
Show and hide clocks