Keep track of the schedules of selected family, friends, or colleagues. If you share a user account on your Mac with other family members, you can view their individual calendars in iCal.
To create a new calendar, click the New Calendar button (the "plus" sign) in the bottom-left corner, and type a name for the new untitled caledar (left). Click the new calendar in the Calendars list, then click the Info button to open the Info drawer. Choose a color for the calendar from the pop-up color menu found in the top-right corner of the Info drawer (shown below).
To change the color of a calendar, select the calendar (click once on its name) in the Calendars list, click the Show Info button, then choose a color from the pop-up menu in the Info drawer (shown below and left).
To change a calendar name, double-click the name in the Calendars list, then type a new name.