On World Clock, open More (the ellipsis in the upper-left corner), then choose Settings.

Choose a time format

Open Time Format and choose:

  • Follow System to use your device’s time-format preference.
  • 24-Hour Time for times such as 18:30.
  • 12-Hour Time for times such as 6:30 PM.

The preference applies to clocks in the app and widgets, as well as formatted sunrise and sunset times. It does not change a city’s time zone, the selected date, or the actual moment being compared. Widget changes may take time to appear.

Choose a temperature unit

Open Temperature Unit and choose:

  • Follow System to use your device’s regional temperature preference.
  • Celsius (°C) to show temperatures in Celsius.
  • Fahrenheit (°F) to show temperatures in Fahrenheit.

The preference applies to weather temperatures in the app and widgets. It does not change the underlying forecast. Widget changes may take time to appear.

Show or hide illustrations in the app

Use Show Artwork to show or hide city and country illustrations. Turn it off if you prefer a simpler background. This setting does not remove your saved locations or change their times.

Show or hide illustrations in widgets

Use Show Widget Artwork to control city and country illustrations in Home Screen widgets. Widget artwork is on by default. Turn it off for a simpler clock layout with larger time text. This setting is separate from Show Artwork, so you can use illustrations in the app and hide them in widgets, or the other way around.

After changing the setting, allow a moment for iOS to refresh the widgets. Weather backgrounds and weather symbols can still appear when widget artwork is off.

Choose how timeline markers line up

Enable Align timeline markers to line up the selected-time markers across city rows. The daylight bars then share a time reference based on your device’s time zone, making it easier to compare daylight at the same moment.

With this setting off, each city’s bar uses its own local day, so the selected-time markers can appear at different positions. Neither choice changes the city times themselves.

Move the time slider

Enable Place slider on the right to put the vertical time slider on the right edge. Turn it off to use the left edge. Its date and time controls work the same way on either side.

Show English location names

On non-English devices, Show original English names lets you display the bundled English location names. This changes how names are shown, not the selected locations or their time zones.