You may edit the applet parameters:
Enter latitude and longitude in decimal degrees, eastern longitudes with "-" and adjust the HEIGHT of the applet window to the number of days to be computed.

<APPLET CODE="sunpolxx.class" WIDTH=500 HEIGHT=500 ALIGN=bottom archive="AppletClasses.jar">
<PARAM NAME=location VALUE=Berlin>
<PARAM NAME=latitude VALUE="52.51">
<PARAM NAME=longitude VALUE="-13.41">
<PARAM NAME=timezone VALUE=1>
</APPLET>

xx is the version number.