Clock activity? Activities about time?

[Bastien]

Dear Chocolate Frosted Sugar Geeks,

is there a Sugar activity displaying a simple clock?

What activities can be used to teach things about time?  (seconds,
minutes, hours, days, weeks, months, years, decades, centuries...)

Is there a simple calendar activity?  Can we manipulate the earth 
and visualize earth enlightenment depending on the position and the
hour of the day?

Any hint welcome.  Thanks!

-- 
Bastien