@ISODOWI — returns the day of the week for the specified date as an integer, 1 for Monday through 7 for Sunday, per ISO 8601. The date may be in any input date format supported by this plugin, and it must be a valid date within the supported range.

Syntax:
%@ISODOWI[date,infmt]

datethe date to examine; if omitted, uses today’s date
infmtthe input date format, used to interpret ambiguous dates

• Note: This function does not exist in 4NT / Take Command v10 and earlier.