Today, April 23, is UNESCO's World Book and Copyright Day, which celebrates reading and the protection of intellectual property through copyright.  April 23 was chosen because it is the birth or death date of a number of world-reknowned authors, including Cervantes and Shakespeare who died on April 23, 1616.  In a similar spirit, on April 26 the World Intellectual Property Office (WIPO) will celebrate World Intellectual Property Day, chosen because April 26, 1970 is the day on which the WIPO Convention came into force.