Jump into the Expression Editor and create a GregorianCalendar class. It will tell you all these things, and more. It will deal with leap years and other tricky little things.
Now if you don't know how to use the Expression Editor, please read the manual. It's a bit tricky to describe, but you can actually double-click on where you see the class and type your own class there, and it will make one for you, and then you can use the methods on that class that the editor can see through reflection.
GregorianCalendar is a standard Java class in java.util.* so you will be able to use it.
You basically take their date entry, make a GregorianCalendar, and then check to see if it's the weekend.
NOTE: Month is 0-11, so subtract 1 from what they entered!!! Tricks people up.
GregorianCalendar gc = new GregorianCalendar(int year, int month, int dayOfMonth)
if (gc.get(Calendar.DAY_OF_WEEK) == Calendar.SATURDAY ||
gc.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY)
// off you go
Regards,
Geoff
