There are several customization options in Calendars, so you can adjust the app to your lifestyle and preferences.
Change the app’s icon
To change the app’s icon in Calendars (available on iOS):
- Open the Calendars app.
- Go to Settings > Appearance & Haptic > App Icon.
- Select your preferred icon.
Customize the sidebar
To customize the app’s sidebar in Calendars for iOS:
- Open the Calendars app.
- Go to Settings > Appearance & Haptic.
- Personalize your app with custom themes and sidebar styles, and choose the app icon that best suits you.

Calendars uses the theme set in your devices settings follow the steps below to switch to the dark/light theme:
- Open System Settings > Appearance.
- Select the Dark or Light theme.
After this, check whether the Calendars theme has changed as well.
- Open the Settings app > Display & Brightness.
- Select the Dark or Light theme.
You can also manually switch between Dark and Light themes directly in the app settings:
- Open the Calendars app.
- Go to Settings > Appearance & Haptic (Theme Options on iPad).
- Select the Dark or Light theme.