Xcalday is a very simple to use calendar that allows to write one note for each day.
Just click on any day, and enter a note.
Days with notes appear bold in the calendar.
Xcalday takes minimal space in memory and on disk.
Desktop Calendar and Planner is a handy personal organizer
It's an easy-to-browse Hijri Calendar with alarms and other features
Keep track of your events and to-do lists directly from your desktop