World Book and Copyright Day April 23
According to UNESCO:
"23 April: a symbolic date for world literature for on this date and in the same year of 1616, Cervantes, Shakespeare and Inca Garcilaso de la Vega all died. It is also the date of birth or death of other prominent authors such as Maurice Druon, K.Laxness, Vladimir Nabokov, Josep Pla and Manuel Mejía Vallejo."In Canada, Canada Book Day is celebrated on that day.