The Calendar gives you a view of the entire month's date-related data. It is not used for data entry, since it is entered in the Appointment and in the Task areas. The Calendar, however, gives you some important and valuable features that can help you view and work with your schedule.
Where applicable, you can find the the Calendar in the upper left corner of Intellect. All that is visible are the day numbers. A day number in black text is a day for which nothing is scheduled.
You do have a degree of control over the color that is displayed in the calendar. By default, if you have an appointment, the day color on the calendar will be red. The color red is merely a default setting. You can right click on the calendar and choose the menu option "Set Default Day Color" to select your favorite.
Additionally, you can mark any day any color that you wish by right clicking on the calendar and selecting the option to Set Day Color.
Using colors can be useful to help determine when certain types of events occur. For example, you may set the colors for all vacation days to blue so that you can see them easily on the calendar.
This help article applies to Time & Chaos 7