Shakespeare and Cervantes share a traditional death date, 23 April 1616, but they did not die on the same day. Spain had adopted the new Gregorian calendar while England still used the older Julian one, so Shakespeare in fact died 11 days after Cervantes.
Pope Gregory XIII introduced the Gregorian calendar in 1582 to correct the old Julian calendar, which had drifted ten days behind the seasons. Catholic Spain switched at once, but Protestant England kept the Julian calendar until 1752. Cervantes died in Madrid on 22 April 1616 and was buried the next day, and 23 April became his traditional date. Shakespeare died in Stratford-upon-Avon on 23 April by the English calendar, which was 3 May by Spain's. The shared date still has a legacy: in 1995 UNESCO chose 23 April for World Book and Copyright Day, partly in memory of both writers and of the Peruvian author Inca Garcilaso de la Vega, who is also recorded as dying on that date in 1616.




