The 15th Debian anniversary is on 16 Aug 2008. Celebration is done worldwide, as an excuse to get together.
Links to the events:
All country's are listed in:
?? Aug 2008
Since the 16 August 2008 lies on a day of http://debconf.org/ I suggest to have a party at some day (Fr/Sa/Su) a week before or after.
Create wikipage ?/ChZurich for more
Netherlands saturday 16th of August at Open Community Camp. See /NlOcc for further information.