UNESCO declared October 27 as the World Day for AV Heritage to raise awareness of the significance of AV documents and to draw attention to the need to safeguard them. Every year, activities are organized by different institutions worldwide around a theme to drum up interest in the event.
See here for a message from Mr Koïchiro Matsuura, Director-General of UNESCO.
The main World Day for AV Heritage Site lists many 2011 events worldwide:
This page lists some of the events being organised by IASA members to mark the day in 2011.