World Day for Audiovisual Heritage
The World Day for Audiovisual Heritage takes place every 27 October. This commemorative day was chosen by UNESCO (the United Nations Educational, Scientific and Cultural Organization) in 2005 to raise awareness of the significance and preservation risks of recorded sound and audiovisual documents (films, sound and video recordings, radio and television programmes).
Source: Wikipedia — World Day for Audiovisual Heritage (CC BY-SA 4.0)