Just to reduce some of the confusion (or stop it building) England transferred to the Gregorian Calendar in 1752, not 1725 (as previously stated). This meant a 'catch up' exercise of 11 days, meaning that Sept 2nd of that year was followed by Sept 14th. At the same time, New Year's Day moved from 25th March to 1st January. This helps explain those odd months September, October, November & December, which previously lived up to their (translated) names as the 7th, 8th, 9th & 10th months of the year!
Also both Miguel De Cervantes (author of Don Quixote) and William Shakespeare (author of something else...) died (according to some sources) on 23 April 1616. However, Cervantes pre-deceased Shakespeare by 10 days as Spain was already on the Gregorian calendar, while England was still on the Julian