It seems the festival won't be returning.
A gig by Blaž + Simon at the 24 Hour Party People festival in 2014
24 Hour Party People is, as the name implies, an event lasting for 24 hours. Featuring an international line-up with 24 bands of very diverse musical orientations, it was launched in 2012 and takes place in Klub Channel Zero. Besides a line-up of foreign guests, the programme each year is skilfully chosen to present a breakdown of the current highlights in the Slovene alternative music, be it noise rock, ambient electronica, free jazz, or hip hop beats.
While this concert marathon has hosted bands from Croatia (Vlasta Popić, ABOP ), USA (VAZ) and elsewhere, its main programme thrust comes from the Slovene part of the line-up: some of the highlights are Moveknowledgement, Srečna mladina, Nikki Louder, It's Everyone Else, Ludovik Material, All Strings Detached, Joko Ono, and TRUS!.