World Clock Deluxe can use your Internet connection (when available) to automatically check for new versions of the application and for updates of cities, time zones, and DST rules.
On macOS 13 or later, choose World Clock Deluxe > Settings. On macOS 12 or earlier, choose World Clock Deluxe > Preferences. Then click Software Update.
Select the "Automatically check for updates" checkbox.
If you want World Clock Deluxe to download new versions of cities, time zones, and DST rules without asking you, select the "Download updates of cities, time zones, and DST rules in background" checkbox.
To manually check for updates, you can either choose World Clock Deluxe > Check for Updates or click the Check Now button in the Software Update pane of World Clock Deluxe Settings (macOS 13 or later) or World Clock Deluxe Preferences (macOS 12 or earlier).