how to find the year wise week days through X++

static void WeekofDays(Args _args)
{
int i;
date j;
;
info(strFmt("%1",dayOfMth(systemDateGet())));
info(strFmt("%1",dayOfWk(systemDateGet())));
i = dayOfWk(systemDateGet());
switch(i)
{
case WeekDays::Monday :
info("Monday");
break;
case WeekDays::Tuesday:
info("Tuesday");
break;
case WeekDays::Wednesday:
info("Wednesday");
break;
case WeekDays::Thursday:
info("Thursday");
break;
case WeekDays::Friday:
info("Friday");
break;
case WeekDays::Saturday:
info("Saturday");
break;
case WeekDays::Sunday:
info("Sunday");
break;
default:
info("Nothing");
}

for(i=7;i<=365;i+=7)
{
j = systemDateGet()+i;
info(strFmt("%1--%2",date2str(j,123,2,-1,2,-1,4),dayOfMth(j)));
}
}