I accidentally discovered in an older blog post by R.De Leeuw that you can query world day ranking from the past with an url like: 

https://www.gps-speedsurfing.com/default.aspx?mnu=forum&forum=2&val=28211

This is a very nice but unpublicized feature of the site.
What is the correct syntax of this url and/or is this available through a menu on the site ?

(see blog http://www.windsurfblog.nl/2011/05/wet-test-mauisails-tr-7.html)

The syntax for this URL is as mention in the posting above, but it doesn't contain location or date specific information from this view. Numbers used in this syntax are created sequential and therefore there's no menu to get access to this.