Add a custom icon to your day:-
-Tap on the + button
-Tap on the Icons button
-Select the icon you want to add
-Tap on the days
You can add multiple icons to each day, and edit which icons appear on a day in Day Properties.
-Tap on the day
-Tap on the Pencil Icon in the top of the screen.
-Tap and hold icons to make them your Favourites