Syntax
#(tint.day-of-week,%year) #(tint.day-of-week,%year,%month) #(tint.day-of-week,%year,%month,%day)
%year specifies the year since 1900 as a number. %month specifies a month as a number between 1 and 12. %day specifies a day as a number between 1 and 31. The result of this call will be a number indicating the day of the week starting with zero for Sunday.
Example
#(tint.day-of-week,#(tint.current-date,(,))) 0