Prompt date - Composer

Hi guys,
Question here, on Composer there is as you know a JS file that tells how to reproduce the guides.
The Date one says:

The format specification can

  • modify which fields are spoken. If no format specification

  • parameter is given, the month and day are spoken. Otherwise,

  • the date fields specified in the format specification will be

  • spoken. Each output field is represented by a constant in the

  • Format class. Multiple output fields are specified by

  • bitwise OR’ing the appropriate constants.

  • @param value The date in YYYYMMDD format.

  • @param format An optional format specification

  • @return An array of URL strings.

How can we specify such format from Composer??? Or we have to modify the JS to a static one?