View appointments in your calendar
You can organize your calendar appointments by clicking on the clock in the panel, if you're using a mail and calendar application called Evolution.
If you have already set up Evolution, click the clock on the menu bar and then click the Add Event to start adding appointments. As appointments are added, they will appear below the calendar when you click on the clock.
To quickly get to the full Evolution calendar, click on the clock and click the first line where today's date is.
This will work only if you have an existing Evolution account. Otherwise, a window will appear with the necessary steps for adding your first account.
Turn off Evolution calendar integration
You can also turn off this feature if you like.
Click on the clock and select Time & Date Settings.
Now, switch to the Clock tab.
Uncheck Coming events from Evolution Calendar.