You can select one post-it for your memo and add it to the calendar.
You can see checkbox to each note(memo) in the list of the note(memo) screen. Check it when it is done then check mark will appear in the list of the calendar.
When the note(memo) is saved, the post-it appears on the date that you select, and you can see whether it has note(memo) or not at one view.
Take notes and memos, save them to the calendar, check and confirm them on the NoteCalendar!