Use up/down arrow to go to the next/previous day. Use left/right arrow to go to the next/previous hour. Use the sliders to set your latitude, longitude and time zone (or edit the first couple of lines in the "Sky" sprite). The default is Louisville, KY EDT. You can get your latitude from google maps by clicking a location and looking at the URL. The time zone should be the offset from UTC (e.g. -4 for Eastern Daylight Time). You may also specify any date and time by editing the "dateToJD" call, where it gets the current time.
