You can enable the dark theme from the second page of Quick Settings.

Google also created wallpapers that “subtly shift from light to dark,” depending on the set theme.

Tapping opens a monthly calendar with the ability to tap a day to see all events, with an additional click opening the Google Calendar PWA. You can see other months and quickly return to “Today.”.

This takes up the same size as Quick Settings, while any available alerts appear just above. Notifications from the same sender are now grouped together, while there are bigger touch targets for alert actions.

Besides the collections curated by Google, you can set wallpapers from your Google Photos library.

This experience also lets you set the device theme (auto-switching available), and Screen saver with three styles available: Slide show, Feel the breeze, and Float on by