Obsolete instruction
DAY_OF_WEEK1 returns the day of the week for any date as an INT. The number 1 corresponds to Monday, 7 corresponds to Sunday.
This instruction is allowed to be compiled because of the down-compatibility to lower versions but cannot be selected in the “Instructions” pane anymore. It will be replaced by: DAY_OF_WEEK0 Restituisci il giorno della settimana