It is now possible to add a Day Note per aircraft in the Calendar section.
To add a Day Note follow these steps:
Hovering the mouse over the will display the text of the note in the tooltip.
You can also edit and delete the flight note. The process is similar to the one when adding a note. You simply right-click the mouse and choose 'Edit Day Note' option. Edit window will contain both EDIT and DELETE button.
The 'Day Note' doesn't feature anywhere apart from the 'Calendar' view in the SCHEDULE.