Polar Sky
The PolarSky plugin draws a polar plot on the Targets channel and shows a small window with astronomical almanac info (sun set/rise, moon set/rise, twilights, etc).
Since the polar plot guides are useful in interpreting the plots of targets, etc. you will usually want to start this plugin if you are planning to also use the Target List or Visibility Plot plugins. If you are not interested in the almanac info you can minimize the plugin UI after starting it.
PolarSky Window
The PolarSky channel contains time information for the site, the sun, and the moon. Under “Site Date/Time”, it has the date in yyyy-mm-dd, local time and time zone, UTC time and date in mm/dd, and LST.