Hi to all

I started using BIRT only recently. So I apologize if my question is too easy for you.
I created a report parameter (display in list box mode) that is linked to a simple query that extracts a list of dates.
I set the sort direction as ascending but I would like to set the default value with the most recent date
I tried to set the default value in different ways but ..... nothing
how do I set it ?
thank you for all