To make it work for your own location the first thing you need is your latitude and longitude - so find an atlas and look up the coordinates of your home town.
Begin by clicking the globe icon 
on Stargaze's button bar to bring up the home location dialogue box:
Type in your place name in the
Home Location box.This is displayed below the map, in the status bar, but otherwise isn't actually used by Stargaze - it is only there for your benefit!
Enter your Longitude &
Latitude in degrees and minutes. Now click the
Time zone tab:
Choose the Use Windows settings option. Finish by Clicking the OK button.Windows knows both your time zone and whether you are in daylight savings time (or summer time) so, unless you need to draw a map for somewhere other than your home location, following the above steps is all that most users will need to do. And you only ever have to do this once - Stargaze remembers what you have entered.
If you don't want to accept Windows' settings, perhaps because you want to draw a map for somewhere else in the world, then make sure that Use Windows settings is unchecked so that you can enter the time zone and summer time settings manually.