This calculates the day of the week for a any date in the past or in the future After you have pressed the green flag, you write the date you want !!! It is important to write dd.mm.jjjj (06.11.3052) not 6.11.3052 !!!
This only determites the day for the Gregorian calender, so the day is only correct, if the date is after 1582 Idk why but it stoped working at some point. if you know why please tell me