You can temporarily stop forming a habit without deleting it by switching its status to 'Inactive'.
The 'Inactive' feature is useful in cases when you need to postpone the forming of your habits, e.g. business trips, vacations, illnesses, exams, etc.
To deactivate your Habit, click on the "Active" button found on the top-right side of the screen.
Once deactivated, the days highlighted in purple will turn grey and the button will say "Inactive". Inactive Habits won't show up on the "Today" page.
To reactivate the Habit, simply click "Inactive" and this will reactivate your Habit.