784aea2a_The_SunClock_Applet__Description
[Parameter] updateDelta [Type or Values] Realtime, Minute, Hour, Day, Week or Month [Description] 
Each time the display is updated, a new time is shown. This parameter determines how that time is chosen. Realtime means the current actual time is used. The other choices add a fixed interval to the previous time displayed. Using multiples of a day keeps "noon" at the same point on the map but shows how the seasonal illumination curve changes.
The SunClock Applet
Description