I noticed that the clock applet regresses at least the graphical preferences, but it is customisable by using dconf-editor
:
dconf-editor /com/canonical/indicator/datetime
This lets you change between 12/24 hours, date format, year, and such. I wonder if this can be incorporated into the clock settings as seen when pressing "Time & Date Settings..." from the context menu.
Each one is actually a package, so you could remove indicator-datetime
, indicator-sound
, indicator-messages
, etc to prevent them from appearing.