There are two operational settings for the Calendar Tool: (1) normal use as a functioning software system; (2) use as an example in software engineering courses.

Since the Calendar Tool is designed as general public domain software, there is no specific operational setting in which it is intended to be installed. The setting for which it is appropriately suited is an office or organizational environment of some form, where users maintain their own calendars and need to schedule meetings with other users on a regular basis.

For use as a pedagogical example, the Calendar Tool has been designed to fit the curriculum used by Gene Fisher in undergraduate and graduate software engineering courses at Cal Poly University. These courses are two-quarter sequences that cover standard aspects of software engineering, with emphasis on the practical application of formal methods. For the most part, the concepts covered in these courses, and hence the concepts embodied in the Calendar Tool, are mainstream software engineering. Other instructors may therefore find the Calendar Tool and its development artifacts useful as course examples.