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Device features
Regional Settings

Change the display formats

  1. Open Regional Settings.
  2. Under Formats, tap Region > tap a country. Format Previews shows how dates, times, numbers, and currency will look.
  3. Tap Apply Changes and Restart > Apply and Restart. To save the change without restarting, tap Apply Only. The change doesn't take effect everywhere until your device restarts.

Checked against the LuneOS code and installed apps. Nobody has tried these steps by hand yet, so tell us if something differs.