There are many methods for making a new appointment in the GNOME Calendar, the easiest by pressing the New button on the button bar. Whenever you make a new appointment you will launch the Create New Appointment dialog that allows you to set the properties of that appointment. The Create New Appointment dialog is broken into two different tabs, the General and the Recurrence tabs.
General - The General tab is the area in which you define when the appointment is and set reminders for yourself. There are four different areas on the General tab: Summary, Time, Alarms, and Classification.
Summary - The Summary box allows you to type a description of the appointment. Keep in mind that only a portion of this description will be available in the Week and Month Views.
Time - The Time area allows you to set the time range for the appointment by selecting the date and hours. Beside each start and end days there is a small selection box named Calendar. This will bring up a small Calendar when pressed. You may select the start and end date in the small calendar. Beside the start and end hours there is a small button which will display the hours of the day when pressed. Each hour in the list will have a sub menu displaying each quarter hour so you may select them.
Alarms - The Alarms area allows you to set up an alarm to remind you of an appointment. There are four different types of alarms you may use to remind yourself of appointments: Display, Audio, Program, and Mail. The Display alarm will display a message on your screen in the time you set. The Audio alarm will play an audio file in the time you set. The Program alarm will run a program you specify in the time you set. The Mail alarm will send email to the user specified in the time you set.
Recurrence - The Recurrence tab allows you to specify how often an appointment should recur, if at all. The first property you should set if you want a recurring appointment is the Recurrence rule. You may choose among None, Daily, Weekly, Monthly, and Yearly. For each selection you may adjust the recurrence properties for your selection. In the Ending date area you may set a rule which will stop the recurrence of your appointment or allow it to repeat forever. In the Exceptions area you may make exceptions to the recurring appointment by selecting the date a pressing the Add button.