1. Open the app → Settings
2. Scroll to → Views and click on → Day
3. There you will find the checkmarks corresponding to each element in the panel. Uncheck all of them or just the positions, you want to exclude from your Day View.
Hint: Please note, that if you activate birthdays only, you may see a blank panel on certain days in the Day View. The blank space appears, when there are no birthdays on the particular days.