indicator-datetime 0.3.1-0ubuntu1, Ubuntu 11.10
When Evolution is not installed (as it isn't by default), the dates in the clock menu's calendar do nothing, but highlight as if they are clickable.
<https://wiki.ubuntu.com/TimeAndDate#settings>: The “Coming events from” menu should default to “Evolution” if it is installed, otherwise “Lightning” if it is installed, otherwise “Subscribed Calendars”.
<https://wiki.ubuntu.com/TimeAndDate#menu-calendar>: "The dates shown in the calendar should behave, and look, as normal grid-layout menu items. Each date should be sensitive only if it is in the current month and the calendar application selected (if any) in settings is installed. Activating an item should open that date in the calendar application."
[Originally reported as part of <https://blueprints.launchpad.net/ubuntu/+spec/ps-p-indicator-refinements>.]