In Ubuntu you can have the appointments in your calender appear in your desktop calender/clock. If you’ve just come over from years of Microsoft Windows use, Evolution is the linux equivalent of Outlook. Ubuntu works with the Evolution mail client to give you quick access to your appointments and tasks right on the desktop, without having to open your email program. Here’s how it works…
Open Evolution from the Applications > Office menu.
Click on Calenders in the bottom left corner.
Double-click on a date and/or time where you want to place an appointment. A dialog box will open up, fill in the details and click Save to make an appointment.
Click on the time & date on your upper toolbar, in the upper right hand corner of the screen. You’ll see a calender drop down. You’ll notice that whatever day you have put a calender event will be in bold text.
Click on that day, and you’ll get a little display of your appointments for that day.
That’s it, all very quick, and without having to open you calender application.
Here’s what it will look like when you click on a day that you have an appointment scheduled.

[...] Calendar / Appointment / Task application — Rainlendar 2 I loved being able to have my Evolution appointments show up in the calendar that’s attached to my taskbar. This totally kicks Outlook’s butt. This is a great feature because it allows me to see my [...]