How do sub-calendars appear on the left side of Google Calendar?

Sub-calendars in Google Calendar are displayed in alphabetical order on the left side of the interface. This arrangement allows users to quickly locate and select the specific calendars they wish to integrate or view alongside their main calendar. Having sub-calendars organized alphabetically provides a consistent and predictable method for users to navigate through their various calendars, making it easier to manage events and schedules.

If sub-calendars were arranged chronologically, by user preference, or in random order, it could lead to confusion and inefficiency, as users would have to spend additional time searching for the appropriate calendar rather than easily finding it based on its name. Alphabetical organization streamlines the user experience, enhancing overall accessibility and utility of the calendar feature.