It is sometimes required to use the weekday names in the request url in a form that deviates from the culture default (e.g. use the names without the accent, or different abbreviations).

h4. Additional Information
See this post for a real life example:
http://forum.team-mediaportal.com/epg-grabbers-tuningdetails-296/italy-grabbers-url-changed-alice-virgilio-59463/index2.html#post558252

Also this post contains a patch to implement this feature.