The discussion focuses on a simple text-based calendar format, likely called Calendar.txt, which groups events in a one-line-per-event style. Despite its simplicity and alignment with Unix philosophy, there are mixed reviews about its usability and practicality. Some users appreciate its grep-friendly format, akin to the Emacs diary system; however, others criticize it for lacking essential features like reminders, the ability to manage multi-day events, and ease of use compared to full-fledged calendar software. Users have highlighted the need for features such as event recurrence, syncing capabilities, and better metadata handling. Overall, while the concept fits a niche for minimalism and version control, the limitations may hinder broader adoption for active calendar users.