The GNOME Calendar can be used in the state which it is shipped but there are some tools available to make sure it is setup the way you would like it to be. The first place you should go is the GNOME Calendar Preferences. You can find the Preferences dialog by selecting the Preferences menu item from the File menu.
Figure 14-2. The GNOME Calendar Preferences
The Calendar Preferences dialog is broken up into two tabs, Time display and Colors.
Time - This tab is broken up into three main sections: Time format, Weeks start on, and Day range.
Time format - This allows you to choose between a 12 or 24 hour format clock.
Weeks start on - This allows you to define what day your week will start on, Sunday or Monday. This will affect how the calendar is laid out in the Day and Week views.
Day range - This section lets you choose what time your days will start and end. Any hours outside the range selected will not be displayed on your Day view.
Colors - This tab allows you to change the default colors used in the Calendar. There are seven color choices you can customize: Outline, Headings, Empty days, Appointments, Highlighted day, Day numbers, and Current day's number. Each choice has a small color selector box next to it. When you press this box you will be given a color selector dialog in which you can choose the color you want. Once you have selected a color the small sample calendar on the right side of the tab will preview your choice.
Once you have made the changes to the Calendar Preferences you may press the Apply button to apply them.