The choice of the day was primarily because two authors died on this day. Today's question relates to both of them. Incidentally, this day is also associated with the birth and death of other literary figures. For instance, Vladimir Nabokov was born on this day.
Q1 The association of this day with books began in Spain because a leading Spanish writer died this day in 1616. Who was he?
Q2. Coincidentally, Shakespeare's death also happened on 23rd April 1616. However, that's not quite true. How?
Questions triggered by this Tender Leaves post