Hi,
this isn't very complicated.
Here's a sample for you: Dateien freigegeben - Acrobat.com
You just need 7 fields named "Day" and a small script in the exit event of your date field.
if (not $.isNull) then var datePattern = "DD.MM.YYYY" var date = Date2Num($.formattedValue, datePattern) for i = 0 upto 6 do Day[i] = Upper(Num2Date(Sum(date, i), "EEEE")) endfor else for i = 0 upto 6 do Day[i] = "" endfor endif