In Daylite you can create a Smart Calendar in a few different ways for many different reasons. Maybe you want to create a calendar view based on the category or keywords? If you have long-winded projects, you could create a calendar simply based on projects or certain types of projects.
From the "My Calendar" view you can click on the filter icon (see below) and select the criteria you wish to use for the Smart Calendar.
After entering your criteria click the 'Save as Smart List' button.
Another way you can create a Smart Calendar is by clicking the plus "+" button on the bottom left of the application window and then choosing "New Calendar Smart List".
The final way to create a Smart Calendar is from the menubar: File -> New -> New Calendar Smart List.