@MONTHLEN — returns the number of days in a given month.

Syntax:
%@MONTHLEN[month,year]

month1 through 12, or JAN … DEC; if omitted, defaults to the current month
yearcan be either 1601 through 9999, or 1 for leap years, 0 for common

The year parameter is only significant when month is 2. If year is not specified, the default is the current year.

• New: This function does not exist in Take Command.